1. Math

    Which of the following is a prime #? a.2 b.19 c.37 d.51 e.67 I choose 2. But the book answer is 51. The book says:( 2,19,37, and 67 are prime #'s) 3x17=51, so it is not prime. I forgot what prime #'s mean that's why I choose anything like 2. help me. A

    asked by Mack on August 9, 2007
  2. Math

    A positive integer n is defined as a "prime interlude" if n-1 and n+1 are both prime numbers. Which of the following is not a "prime interlude?" a.4 b.18 c.30 d.72 e.90 ( First of all; What is a "prime interlude??") I don't understand the question and

    asked by Mack on August 10, 2007
  3. Math

    ) Form a conjunction from the following two statements and determine if the conjunction is true or false. Explain. Two is an even number. Two is a prime number. A) Two is an even number or two is a prime number.; False B) Two is an even number and two is a

    asked by Anonymous on October 20, 2009
  4. PROBLEM SOLVING IN MATHEMATICS

    there are two prime numbers between 100 and 199 such that the ten digits is a prime number, the ones digit is a prime number and the tens and ones digits taken together are a 2 digit prime number. find the sum of these 2 prime number.

    asked by alya on October 6, 2011
  5. Data Structure and Algorithms in Java

    A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. On the other hand, a composite number is a natural number greater than 1 that is not a prime number. For example, 5 is prime, as only 1 and 5 divide

    asked by ahmad on March 31, 2017
  6. Math

    Plz help don't know how to do this question. Write number 68 as a product of prime factors. Try to do prime factorazation. start dividing by 2 68 34 2 17 2*2 Can you go any further? Are all these prime? prime factorization of 34 98

    asked by Maya on November 7, 2006
  7. Math

    The number p is the product of three different positive prime numbers greater than 2.If the sum of these three prime number is also prime, what is the smallest possible value for p? Won't the 3 number be 3-5-11? Thanks

    asked by Shadow on May 21, 2014
  8. math

    The Florida Lottery is made up of the numbers 1-49. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 1-49: 2.What is the probability of a prime number being picked randomly from the numbers 1-49?

    asked by Anonymous on January 18, 2010
  9. math

    The Florida Lottery is made up of the numbers 1-49. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 1-49: 2.What is the probability of a prime number being picked randomly from the numbers 1-49?

    asked by Anonymous on January 18, 2010
  10. MATH!

    The sum of two prime numbers is the prime number 89,563. Find the smaller of the two addends. I attempted the problem but I'm not sure if it is right. 89,561 is a prime number and so is 2. So is the answer 2?

    asked by Lee on May 6, 2011
  11. math

    the florida lottery is made up of the number 1-49. my mother observed that the winning numbers many times are prim numbers. a. list the prime numbers from 1-49 b. what is the probability of a prime number being picked randomly from the numbers 1-49? c. is

    asked by ssmomo on February 1, 2010
  12. math

    Can someone help me with prime and composite numbers? Prime numbers are counting numbers that can be divided evenly bt only two numbers:1 and themselves. A prime number can also be described as a counting number with exactly two factors, 1 and itself. So,

    asked by haylo on October 24, 2006
  13. Math

    What prime number am I? • I have three prime factors • each prime factor is a different number • I am a multiple of 10 • I am less than 50 Please help answer this question??

    asked by Punch on October 7, 2016
  14. Math

    All numbers in our real number system are the product of prime numbers. Complete the following steps for this discussion: 1. List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was

    asked by Tammy on March 28, 2013
  15. Math

    1.) Is it possible for a composite number to have more than one prime factorization? Is it possible for a number to have no prime factors? Why? 2.) Give an example of how prime factorization could be used in the real world. Thank you to anyone that takes

    asked by Emma on October 4, 2017
  16. Math

    What is my number? 1.My number is a perfect square 2.The only prime number in it's prime factorization is 2 3.My number is a factor of 32 4. The sum of it's digits is odd.

    asked by Lily on January 11, 2017
  17. math

    number is greater than 50 and less than 100. you can make exactly 5 different rectangles with a mystery numbers of tiles. its prime factorization consists of only one prime number. whats my number

    asked by Anonymous on January 24, 2011
  18. Math

    1. Is it possible for a composite number to have more than one prime factorization? 2. Is it possible for a number to have no prime factors? Why? 3. Give an example of how prime factorization could be used in the real world

    asked by Ali on January 14, 2016
  19. Math

    Is it possible for a composite number to have more than one prime factorization? Is it possible for a number to have no prime factors? Why? Give an example of how prime factorization could be used in the real world.

    asked by Young Lil G on September 4, 2017
  20. Math

    What prime number am I? I have 3 prime factors Each prime factor is a different number I am a multiple of 10 I am less than 50

    asked by Matt on October 6, 2016
  21. IB HL Math

    I need to that if there is better way to prove the following: I am trying to prove that x r = k and k is a multiple of x only when x is prime. I said that if x is non-prime, then: Let a = 6 Let r = 4 6! (6 – 4)! 4! = 3(2) x 5 x 4! (2!) 4! = 15 It is not

    asked by Asad on March 14, 2009
  22. math

    the sum of the digits of a two digit prime number is substracted from the number. prove that the difference cannot be a prime number.

    asked by mima on April 12, 2012
  23. Math

    If a composite number has the first five prime numbers as factors, what is the smallest number it could be? Write that number's prime factorization.

    asked by Sue on September 24, 2009
  24. math

    a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number

    asked by tom on November 15, 2012
  25. math

    a mystery number is bigger than 50 and larger than 100. you can make exactly five different rectangles with the mystery number of tiles. its prime factorization consists of only one prime number. what is the number

    asked by tom on November 15, 2012
  26. Math

    There are 13 flavbors at a local ice cream parlor. Is the number 13 a prime number or a composite number? If it is composite, write the number as the product of prime numbers

    asked by Sai on August 10, 2010
  27. math

    You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2^2 3^2 (that is 2 squared

    asked by m on October 15, 2010
  28. math

    You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3

    asked by thomas on June 23, 2009
  29. math

    You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2 to power 2 3 to power 3

    asked by thomas on June 23, 2009
  30. Math

    Q. The coach of a baseball team separates the players into groups for the drills. Each group has the same number of players. Is the total number of players prime or composite, explain. - A. They really don't say the number in the book, but i would have to

    asked by Lilly on October 7, 2015
  31. Math

    Let n = c x p, where p is a prime number, and c is a composite number less than p. The number c has three unique prime factors. How many unique prime factor does n^2 have?

    asked by Anne on July 2, 2014
  32. math

    Part 1:Is it possible for a composite number to have more than one prime factorization? Is it possible for a number to have no prime factors? Why? I think it is possible for a composite to have more then one prime factorization Part 2: Give an example of

    asked by Luna on September 11, 2017
  33. maths

    4x+3y=21 What is your question? You have simply stated the equation of a straight line. what is a prime factorazation?> expressing a number in terms of its Prime factors eg. 126 = 2*3*3*7 all the factors are prime numbers How does this relate to the first

    asked by abi on March 23, 2007
  34. Math Prime Numbers

    Grade 7 question: I am a two-digit prime number I am one less than a multiple of 10 If you add 30 to me you get another prime number Who am I _________?

    asked by Elena on September 9, 2008
  35. Math

    I am a prime number between 40 and 50. If you add one to me the sum of the prime factors of that composite number is 11. What number a I.

    asked by Danielle on September 25, 2007
  36. Math

    I am a prime number between 40 and 50. If you add one to me, the sum of the prime factors of that composite number is 11. What number am I?

    asked by Kris on November 30, 2008
  37. math

    I am a prime number between 40 and 50. If you add one to me, the sum of the prime factors of that composite number is 11. What number am I?

    asked by veronique on September 27, 2007
  38. math algebra

    Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990 Im stuck

    asked by Ben on July 29, 2015
  39. math

    my number is a multiple of 5, but doesnt end in 5, the prime factorization of my number is a string three numbers, two of the numbers in the prime factorization are the same, my number is bigger than the seventh square number

    asked by Anonymous on October 6, 2010
  40. math

    Jo needs to know which of the following cannot be a prime number whenever p is a prime number greater than 2001. A. p-2 B. p+2 C. p+999 D. p+9990

    asked by ben on July 29, 2015
  41. Math

    The prime factorsof a number are the first four prime numbers. No factor is repeated. What is the number?

    asked by Cons on October 16, 2017
  42. Math

    What are 2 prime numbers between 100-199 such that the tens digit is a prime number, the ones digit is a prime number, and the tens and ones digit taken together are 2 digit prime number.

    asked by Anonymous on April 24, 2013
  43. Math (Complex Numbers)

    Let N be the sum of all prime powers that can be written as 4^n+n^4 for some positive integer n. What are the last 3 digits of N? Details and assumptions: A prime power is a number of the form pk, where p is a prime and k is a positive integer. Examples:

    asked by Mahler on May 9, 2013
  44. math

    what is my number? Clue 1 My number is a multiple of 5,but it does not end in 5. Clue 2 The prime factorization of my number is a string of three numbers. Clue 3 Two of the numbers in the prime factorizations are the same. Clue 4 My number is greater than

    asked by gary on September 13, 2010
  45. math

    what is my number? Clue 1 My number is a perfect number. Clue 2 The only prime number in its prime factorization is 2. Clue 3 My number is a factor of 32. Clue 4 The sum of its digits is odd.

    asked by Anonymous on November 28, 2015
  46. Math

    What is my number? Clue 1. My number is a perfect square. Clue 2. The only prime number in its prime factorization is 2. Clue 3. My number is a factor of 32. Clue 4. The sum of its digits is odd.

    asked by Claire on October 4, 2017
  47. Math

    Marta is thinking of a number. The prime factorization of the number is the first eight primes, each used as a factor exactly one. Write the prime factorization and the number.

    asked by Cons on June 21, 2017
  48. Math

    What is the square of the least two-digit prime number? What is the least two-digit prime number? 11 how do i show that the polygons are similar by checking that corresponding angles have equal measures and corresponding sides are proportional? 10 11 So

    asked by Christian on January 11, 2007
  49. Math

    Alice wants to find all the prime factors of the number you get when you multiply 17•11•13•7. She thinks she has to use a calculator to pay Sam although multiplications and then find the prime factorization of the resulting number. Do you agree? Why

    asked by Nerd1234 on January 10, 2016
  50. Algebra

    Is there any prime number whose root is an integer? I meant to say Square Root Nevermind I figured it out. Good work. If a prime number by definition has no factors, ...

    asked by Jess on June 26, 2007
  51. Math

    1: Goldbach's Conjecture is a famous conjecture that has never been proven true or false. The conjecture states that every even number, except 2, can be written as the sum of two prime numbers. For example, 16 can be written as 5+11. 1 a: Write the first

    asked by Jordan on October 9, 2017
  52. math

    find 2 prime numbers that if multiplied would generate a 400 digit number I'm not sure what you want. 400 is a three-digit number, and 4000 is a four-digit number. I don't think you want a "400 digit number." Assuming you want a number with a value over

    asked by quita on November 29, 2006
  53. Math

    A particular fraction has a prime number in the numerator and a different prime number in the denominator. Justify whether or not this fraction can be simplified and give reasons.

    asked by Lan on April 30, 2018
  54. Math(Please check answers)

    Factor completely. If the polynomial cannot be factored say it is prime. 1) 15x^3 + 19x^2 + 6x A) (3x^2 +2)(5x+3) B) x(3x+2)(5x+3) C) x^2(3x+2)(5x+3) D) x(5x+2)(3x+3) E) Prime I chose E) Prime. 2) 2x^2 - 14x - 6x + 42 A) 2(x+7)(x+3) B) (x+7)(2x-6) C)

    asked by Hannah on September 9, 2010
  55. Math

    Greta said that the product of two prime numbers must also be a prime number. Joan disagreed. Who is correct?

    asked by KC on December 7, 2011
  56. Calculus

    What is the largest two digit prime number whose digits are both prime numbers?

    asked by Ashley on January 27, 2008
  57. Math

    Are these prime number correct all the way up to 50 (1,3,5,7,11,13,17,22,23,25,27,31,33,35,37,41,43,45,47 ) What kind of tens are prime

    asked by JJ on September 8, 2011
  58. math

    What is the greatest prime number you must consider to test whether 5141 is prime?

    asked by timothy on July 20, 2009
  59. maths

    my number is less than 100 one more than a multiple of 3 one of its digits is prime if you reverse its digits you get a prime it has exactly four factors the sum of digits is prime if you miltiply it by 5 it is greater than 100

    asked by ashley on February 19, 2014
  60. math

    How do the ideas of divisibility and multiples relate to the study of fractions? Show that 1,078 and 3,315 are relatively prime. What is the shortest length of television cable that could be cut into either a whole number of 18-ft pieces or a whole number

    asked by anonymous on February 18, 2011
  61. Geometry Help

    Triangles DEF and D'E'F' are shown on the coordinate plane below: Triangle DEF and triangle D prime E prime F prime with ordered pairs at D negative 1, 6, at E 1, 3, at F 6, 3, at D prime 6, 1, at E prime 3, negative 1, at F prime 3, negative 6. What

    asked by Oscar on October 30, 2016
  62. maths

    Find the sum of the smallest 2 digit prime number and the largest 2 digit prime number.

    asked by ssssss on March 31, 2012
  63. Math

    What is my number? Clue 1. My number is a multiple of 5, but it does not end in 5. Clue 2. The prime factorization of my number is a string of three numbers. Clue 3. Two of the numbers in the prime factorization are the same. Clue 4. My number is greater

    asked by Claire on October 4, 2017
  64. Math

    What is my number? Clue 1: My number is a multiple of 5, but it does not end in 5. Clue 2: The prime factorization of my number is a string of three numbers. Clue 3: Two of the numbers in the prime factorization are the same. Clue 4: My number is bigger

    asked by Ann on October 14, 2008
  65. Math

    The question is this: You know that a number is divisible by 6 if it is divisible by both 3 and 2. So why isn't a number divisible by 8 if it is divisible by both 4 and 2? My answer is this: The only prime factors of 6 are 2 and 3. So, if a number is

    asked by B.B. on June 23, 2009
  66. math

    Which number between 29 and 39 has three different prime factors?What is the prime factorization of this number?

    asked by Anonymous on August 14, 2013
  67. mathematics

    Find the smallest prime number N such that the following is true: The largest prime factor of N−1 is A; The largest prime factor of A−1 is B; The largest prime factor of B−1 is 7.

    asked by Sambaran G. on April 22, 2013
  68. Math

    Find the smallest prime number N such that the following is true: The largest prime factor of N−1 is A; The largest prime factor of A−1 is B; The largest prime factor of B−1 is 7.

    asked by Zeneth on April 25, 2013
  69. math

    is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the

    asked by sammy on November 15, 2009
  70. math

    is there a way to do this problem or do i have to just guess and check. because by guessing and checking, i can't find the right answer Name a function with the following characteristics: note: f prime means the first deriviative f is continuous over the

    asked by sammy on November 15, 2009
  71. math last one help

    sally drew a factor tree of a composite number and ended up with 4x4x5x5x3 as the prime factorization. explain what is wrong with this factorization 1. what is the correct prime factorization? 2. what is the composite number that was factored?

    asked by daniel on August 30, 2013
  72. PRE-CALC

    A number is selected at random from the set {2, 3, 4, … ,10}. Which event, by definition, covers the entire sample space of this experiment? A) The number is greater than 2. B) The number is not divisible by 5. C) The number is even or less than 12. D)

    asked by Shawna on March 18, 2014
  73. math

    Consider the given statements. 1. Every prime number is odd. 2. There are 8 prime numbers between 10 and 40. 3. There are 11 composite numbers between 0 and 20. 4. The number 4 is the smallest even composite number. Which two given statements are

    asked by angela on July 15, 2014
  74. simplify fractions{someone help plz}

    ok how do i simplify a fraction if there is no fraction. like for ex this is one of the problems i simplify to 1/2. my numerator is a prime number between 44 and 52 who am i? see i don't get it someone help plz There is only one prime number between 44 and

    asked by breiona on February 22, 2007
  75. Math

    What is a unit rate? what is the prime factorazation for 945? idk how to do this 10= 15= GCF= i need help with my prime factorization homework what is a prime factorazation i meed held on my homework how do u determine if the numbers are prime or composite

    asked by Lindsey on December 12, 2006
  76. math(help)

    please answer this one question because im clueless lol!!! A number is written with the following factorization:2exponet is 3 multiplied 4 multplied 5. is this factorization a prime factorization?please explain to me or why not?if its not correct,please

    asked by matt on November 21, 2013
  77. Factoring and Prime

    I am still having troulbe with these. Her is another one I am stuck on. I think the prime is getting me. Factor completely or state that it is prime x^2 + 9xy + 16y^2 The factors of 16 are: 16 x 1. 8 x 2. 4 x 4. None of these add together to give 9 so it

    asked by Bekki on June 13, 2006
  78. math

    97 is the largest prime less than 100. What is the largest prime factor of 97! (97 factorial)? (Reminder: The number n! is the product of the integers from 1 to n. For example, 5!=5*4*3*2*1= 120.)

    asked by francis on April 19, 2016
  79. math

    Consider the given statements. 1. Every prime number is odd. 2. There are 8 prime numbers between 10 and 40. 3. There are 11 composite numbers between 0 and 20. 4. The number 4 is the smallest even composite number.

    asked by angela on July 15, 2014
  80. conjectures

    I'm finishing my math 20 Pure. This is my last 20 course then i have 30's. Also I have to work a full time job so that I can live on my own with my boy. So it is tough but I'm doing alright. What about you? wow, okay i have no idea what all that is but

    asked by Shay on February 25, 2007
  81. math

    how would you calculate the largest prime number given a number x so for example say someone inputs 8 , the largest prime number is 7.

    asked by sam on October 23, 2014
  82. Pre calc

    Write the equation in standard ellipse form and graph. 34 x^2 -24xy +41y^2 +41 y^2 -25= 0. i got x= (4 x prime- 3 y prime)/5 and y=(3x prime +4y prime)/5 but cant get the correct math when I plug that into the original equation. Also I need help finding

    asked by Rebekah on May 5, 2013
  83. Math

    The number is not less than 20. The number is not greater than 40. The number is not divisble by 2, 3, or 7.THe number is not a prime number. THe sum of the number's digits is not 8. What's the number?

    asked by Grace on October 14, 2009
  84. math

    The Twin Prime Conjecture, which has not been proven, argues that there are infinitely many pairs of primes of the form n and n+2. Such a pair is called a prime pair. Some examples of prime pairs are 5 and 7, 17 and 19, and 29 and 31. How many prime pairs

    asked by Miep on February 18, 2012
  85. Math

    a) Find all of the numbers between 1 and 1,000 that have 2 as their only prime factor. b) What is the next number after 1,000 that had 2 as its only prime fractor?

    asked by Joe on October 4, 2017
  86. MATH HELP

    What is the greatest prime to consider weather to test 1881 is prime. the greates prime to consider is?

    asked by BECKY! on November 19, 2014
  87. math

    What is the greatest prime to consider to test wheather 1579 is prime. What is the greastest prime?

    asked by Michellle on November 18, 2014
  88. prime numbers

    Which of these is a prime number? 407, 409, 411, or 413 409 how did you get that? Suppose you are given some number N. If x

    asked by kim on April 19, 2007
  89. math

    Circle the prime numbers in the following set of numbers. Show your work. 953, 1,427, 2,971 I can tell whether each number is prime but I am having a hard time with individual numbers

    asked by Matthew on April 30, 2017
  90. lcm

    find the least common mutlipe of 420 196 Break down each number into prime number factors 196 = 2*2*7*7 420 = 70*2*3 = 2*2*3*5*7 The least common multiple is the product of all prime factors that occur in both numbers 2*2*3*5*7*7 = 2940

    asked by tayloir on April 23, 2007
  91. math

    Let’s agree to say that a positive integer is prime-like if it is not divisible by 2, 3, or 5. How many prime-like positive integers are there less than 100? less than 1000? A positive integer is very prime-like if it is not divisible by any prime less

    asked by chicken on April 1, 2010
  92. MATH

    Let’s agree to say that a positive integer is prime-like if it is not divisible by 2, 3, or 5. How many prime-like positive integers are there less than 100? less than 1000? A positive integer is very prime-like if it is not divisible by any prime less

    asked by David on April 2, 2010
  93. math

    Is "67" a prime or composite number? 67 IS A PRIME NUMBER

    asked by no name on November 2, 2006
  94. math

    Which numbers between 40 and 49 have 2 and 3 in their prime factorization?Use exponents to write the prime factorization of each number.

    asked by Anonymous on August 15, 2013
  95. math please

    what exactly is a prime factor would x-5 x+5 and x2+25 all be prime factors of x4-625? Yes, I believe those would be the prime factors. x^4 - 625 can be factored into (x^2 -25)(x^2 + 25) and once again into (x-5)(x+5)(x^2 + 25) That is what you have done.

    asked by anonymous on November 30, 2006
  96. math

    Hello, and thank you in advance for your help! I'm writing on behalf of my daughter in 6th grade, who was crying last night about a project that's due tomorrow (Wednesday). For Math, she's supposed to choose her favorite number (16) and create a "project"

    asked by Deb on September 25, 2007
  97. science

    how is the equator similar to the prime meridian A. both the prime meridian and equator are lines that divide earth into norther and southern hemispheres B. both the prime meridian and equator are imaginary base lines from which locations of earth can be

    asked by mary on May 14, 2014
  98. matlab

    Im trying to figure out how to write a program that finds prime factors of a number. I have the following but it only works for the number 12 for some reason. % this program will determine if an integer is prime and determine % its prime factors function

    asked by tom on November 21, 2016
  99. statistics

    A soft drink distributor was interested in examining the relationship between the number of ads (x) for his product during prime time on a local television station and the number of sales per week (y) in 1000’s of cases. He compiled the figures for 20

    asked by Misty on September 25, 2012
  100. Algebra Please check answers

    Could you please check these answers thanks. Directions: Factor each polynomial. If the polynomial cannot be factored, write prime. 1. a^2-16b Answer: (a-16)(a+16) 2. m^2+8m+16 Answer: (m+8)^2 3. 3a^2b+6ab+9ab^2 Answer: Prime 4. 2r^2+3r+1 Answer: Prime 5.

    asked by Rae Rae on April 5, 2009