1. 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
  2. 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
  3. math

    For the numbers from 100 through 199, how many have different digits in increasing order?

    asked by Jody on May 4, 2011
  4. math

    The number 199,557 contains two sets of digits in which one digit is ten times as great as the other. What are the values of the digits in each set?

    asked by liz on October 16, 2014
  5. math

    While adding ten two-digit numbers the digits of one of the numbers were interchanged. As a result the sum of all the ten numbers increased by a value which was four less than that number. Three times the sum of the digits of the original number is ten

    asked by Suzanne on November 14, 2014
  6. math

    While adding ten two-digit numbers the digits of one of the numbers were interchanged. As a result the sum of all the ten numbers increased by a value which was four less than that number. Three times the sum of the digits of the original number is ten

    asked by vipul gediya on May 26, 2018
  7. Math

    Using only the digits 2,3,5 and 7 complete the following problems below. 1.Name two things that the numbers 2,3,5,7 have in common 1.All prime numbers 2.What is the smallest possible number that can be written using each of these digits only once? 2357?

    asked by Jerald on August 28, 2013
  8. Number Sentence

    In a 4-digit number, the two greatest place-value digits are 2. The sum of the ones and tens digits is 14. What numbers are possible? We're told we have a number that looks like 22ab where a and b are the ten's and one's digits, and a+b=14. There aren't

    asked by Joseph on September 18, 2006
  9. MAths

    Consider a digital clock. The first time after midnight when the three digits are all prime numbers is 2:22 am. What is the last time before 10:00 am, when the three digits on the clock are all prime numbers? Details and assumptions If you determine that

    asked by Ian on April 15, 2013
  10. 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
  11. 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
  12. math

    Find all the two digit prime numbers neither of whose digits are prime. Someone helped me yesterday but I do not understand.

    asked by Diana on March 15, 2011
  13. math

    2. Find two consecutive prime numbers less than 40 such that the sum of their opposites -5. 3. Insert plus (+) or minus (-) on the digits 1 to 9 asshown to obtain 100. 1 2 3 4 5 6 7 8 9. How many can you form?

    asked by tsunayoshi on June 30, 2014
  14. Calculus

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

    asked by Ashley on January 27, 2008
  15. Math

    Find all the two digit prime numbers neither of whose digits are prime.

    asked by Diana on March 14, 2011
  16. 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
  17. 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
  18. math

    i posted this one a ways down, i apologize for double posting, but thought this might be a better way to ask. question:if you write the numbers from 1-999 on a piece of paper, (1234567891011121314151617181920...998999) what will the 2006th digit from the

    asked by courtney on October 17, 2008
  19. high school

    Use the digits in the year 2010 and the operations +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial) — along with parentheses, brackets, or other grouping symbols — to write expressions for the counting numbers 1 through 100.

    asked by Sama on December 18, 2009
  20. Algebra - Middle School

    Use the digits in the year 2010 and the operations +, -, x, ÷, sqrt (square root), ^ (raise to a power), and ! (factorial) — along with parentheses, brackets, or other grouping symbols — to write expressions for the counting numbers 1 through 100. All

    asked by Sama on December 18, 2009
  21. Math

    I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands

    asked by Anne on June 6, 2012
  22. MATH

    TWO INTEGERS ARE DEFINED AS "PARTNERS" IF BOTH OF THEIR PRIME FACTORIZATIONS CONTAIN ALL THE SAME PRIME FACTORS. FOR EXAMPLE, 15 AND 45 ARE PARTNERS SINCE BOTH ARE DIVISIBLE BY THE SAME SET OF PRIME NUMBERS 3 AND 5. HOW MANY POSITIVE INTEGERS GREATER THAN

    asked by DEANDRA on September 12, 2012
  23. 5th grade

    The number has 7 digits It is evenly divisible by 100 The value of one of the digits is 60,000 The digit in the hundreds place is both even and prime The digit in the thousandr place is half the value of the digit in the ten thousands place The digit in

    asked by brandon on August 17, 2010
  24. 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
  25. Math

    * How many different odd 3-digit numbers can be formed using the digits 1,2,3,4,5 if none the numbes have repeating digits? * A bus having a seating capacity of 45 people is 80% occupied. When the bus stops one -third of the people get off and 3 people get

    asked by Marie on January 17, 2013
  26. Algebra

    What are the first 100 digits of Pi? How would I make a graph of the frequency of each digit? How would I find the mean of the first 100 digits? Then how would I creat a circle graph of the information in the bar graph? Help please.

    asked by M on March 13, 2007
  27. 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
  28. maths

    Find mean of first ten prime numbers.

    asked by Tarandeep on February 18, 2017
  29. MATHS!!!Please HELP..:'(

    What is the sum of all integer values of n satisfying 1≤n≤100, such that (n^2)−1 is a product of exactly two distinct prime numbers? Details and assumptions The number 12=2×2×3 is the product of 3 (not necessarily distinct) prime numbers.

    asked by Oian on March 30, 2013
  30. Algebra

    For how many two-digit prime numbers is the sum of its digits 8?

    asked by Jack on April 15, 2011
  31. Math

    What is the sum of all prime numbers less than 500 with only 3s and 4s as digits

    asked by Mags on January 11, 2017
  32. math

    (1)I am thinking of a 5-digit odd number. (2)The sum of all its digits is 20. (3) The digits in the hundreds place and in the tens place are consecutive numbers. When you multiply the digits in the tens and hundreds places, you get the digits for the

    asked by Johnny on September 23, 2011
  33. math

    Get the number right. *None of the digits repeat. *It is between 20,000 and 77,777 *The digit in the thousands place is 3 times the digit in the ten thousands place *The ones digit is a prime number *The hundred digit is half the sum of the ones,

    asked by Tori on September 26, 2012
  34. 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
  35. 9th grade Math

    In the multiplication problem A S __x__A____ M A N each letter represents a different one of the ten digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. Which one of the ten digits does A represent?

    asked by Trice on January 22, 2011
  36. Math

    1) The numbers 2 and 3 are prime numbers. They are also consecutive numbers. Are there other pairs of primes that are consecutive numbers? Why or why not? 2) which group of numbers, evens or odds, includes more prime numbers? Why?

    asked by Joe on October 4, 2017
  37. Math (algebra)

    What are the last three digits of the largest perfect square that can be expressed as p^2+pq+q^2, where p and q are (positive) prime numbers?

    asked by Danny on July 16, 2013
  38. 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
  39. Math

    How many distinct numbers greater and equal to 100 and smaller than 3000 can be formed using digits 0,1,2,3,4, without repetition of digits?

    asked by Anna on February 13, 2013
  40. Math

    How can you order three whole numbers with different numbers of digits without comparing the digits? Give an example. I think that I can use the same number with different place numbers like: 4, 44, 444; I don't have to compare numbers. Is this right? If

    asked by Nehemiah on August 24, 2008
  41. math

    A) How many of the three digit numbers can be made from all of the digits, 1,3 and 7, and used only one each,are prime? B) What about 2,3 and 4? Once I get to know what the answer to the first one is, I'll figure out the second one myself.And then if I

    asked by Kajol on November 19, 2016
  42. math

    . The ones digit is 0. . The hundreds and tens digits are consecutive numbers. . The digits in the thousands period have a sum of 15, with the hundred thousands digit being the greatest of the threes digits and the ten thousands digit being the least. .

    asked by sofia on December 11, 2012
  43. math

    which of these statements about prime and composite numbers is true? F)all prime numbers are odd. G)all prime numbers have three factors. H)all composite numbers are divisible by two. J)all composite numbers have more then two factors i thinks it (J) but

    asked by george on March 25, 2010
  44. 4th grade

    when I am rounded to the nearest ten I am 50. The difference between my digits is one. I can be two different numbers. Who am I

    asked by Laurin on November 10, 2010
  45. math

    When I am rounded to the nearest ten I am 40 the sum of my digits is 8 what two numbers can I be

    asked by Anonymous on April 1, 2014
  46. Math

    A book called The Penguin Dictionary of Curious and Interesting Numbers by David Wells (1986) contains fascinating numbers and their properties. One of which is the only 3-digit numbers that are prime and all rearrangements of their digit are also prime

    asked by Kris on November 30, 2008
  47. math

    You have 2 digits, 2 numbers, reverse digits and 54 if the difference and the sum of all is 10 I'm not clear what you're asking, could you clarify what the conditions are for us please? My grandson came home with the problem that he wrote out on a piece of

    asked by Will on September 1, 2006
  48. algebra

    The product of the first ten prime numbers must be divisible by: F. 16 G. 18 H. 20 J. 22 K. 24 Please provide detailed explanation with answer (if possible) Thanks in advance.

    asked by ER on February 17, 2015
  49. Math

    the only perfect number of the form x(n) + y(n) A perfect number is an integer that is equal to the sum of its positive divisors (not including itself). Therefore, 6 is a perfect number, since its positive divisors are 1, 2, and 3 and 1+2+3 = 6. 28, 496,

    asked by Mike on November 19, 2006
  50. math

    What methods can you use to find prime numbers? How are prime numbers used in mathematics? How can you use prime factorization to find the GCF and LCM? Provide an example

    asked by chandice on June 19, 2009
  51. math

    I have ten,ones and tenths.My digits are next door numbers and they add up to 9. What number am I?

    asked by Owen on November 30, 2016
  52. math

    Find the difference between the sum of even numbers between 100 and 110 and the product of prime numbers between 20 and 30. #anyone to help me out

    asked by kelvin on May 19, 2017
  53. 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
  54. math

    write all the possible odd 5-digit numbers using the digits 1,4,7,8 and 0, with the 1 in the ten thousands places.

    asked by lindsey on August 25, 2016
  55. ALGEBRA 2...

    1. Simplify 2.3^5 log base 2.3^1 2. How do you solve this matrix using a graphing calculator AX=B A=9 -3 1 B=-7 X= x 1 1 1 -3 y 16 4 1 21 z 3. How many 4-digits numbers have the thousands digit equal to 2 and the units digit equal to 7? 4. If p and q are

    asked by Anonymous on March 25, 2013
  56. 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
  57. math

    Neelesh is fond of playing number games. Once when his friends were present he challenged them. He said that he has thought of a five-digit number and anyone who guesses it correctly can use his cycle for a full day. ‘To help you,’ he said, ‘I shall

    asked by gayathri on August 13, 2016
  58. Math

    If the digits 1 through 9 are written in order, it is possible to place plus and minus signs between the numbers or to use no operation symbol at all to obtain a total of 100. For example,1 + 2 + 3 + -4 + 5 + 6 + 78 + 9 = 100 Can you obtain a total of 100

    asked by Jeff on January 12, 2010
  59. Math

    Suppose you have two numbers. The difference of the two numbers is 12. The product of the two numbers is 17. Multiply the larger of the two numbers by 100, add 50 times the smaller number to that, round the total to the nearest whole number. That starts

    asked by Lesa on March 24, 2007
  60. Math

    In the town of Niceville, a local lottery is held once a year for the residents. Lottery tickets cost 50 cents apiece. Each lottery ticket contains four numbers, from 1 to 20. The lottery machine will select six numbers from 1 to 20. A winning ticket,

    asked by Samantha on December 29, 2012
  61. Math

    How many digits are in the smallest positive number divisible by th first ten numbers in the Fibonacci sequence?

    asked by Eli on May 28, 2011
  62. Math

    In the numbers 465,531, which places contain digits where one digit is ten times as great as the other?

    asked by Jayden on September 28, 2015
  63. Math

    What do the digits in the number 15 add up to? Answer 1+5=___. Using single digits, how many different ways can you add up to 6?. Example: The least number of digits is 2, and it is 1+5=6. The greatest number of digits is 6, and it is 1+1+1+1+1+1=6. 1.How

    asked by Mohammed on March 21, 2010
  64. Math

    1.) A security code has seven characters. Each code begins with two digits, then two letters, and finally three digits. the number of distinct security codes possible if repetition is allowed? 2.) How many ten digit phone numbers are possible if a number

    asked by Emily on July 16, 2012
  65. math

    write a five digit number(s) that fits each description. use only the digits that the athletes are wearing. use each digit only once in each answer. The digits on athletes are: 4,1,8,3,6 find all of the numbers with a 4 in the ones place and 8 in the ten

    asked by John Dosley on December 11, 2013
  66. College

    Three(3) digit numbers can be formed from the digits 0,1,3,5,7 and 8. How many numbers can be formed without repeats. (A) if the 3 digits numbers must be divisible by 5. (b) if the 3 digits number must be a multiple of 2

    asked by Ibrahim issahaku kpaniyili on July 17, 2015
  67. math,correction, bobpursly

    Since when is 5^7 =8125? if a number is a multple of ten, that means the last digit is zero. The leading digit cannot be zero. 9*10^5*1 on c, again, the leading digit cannot be zero. d is right e. no leading zero is allowed. 9*9*8*7*6*5*4= ? can someone

    asked by bobpursley on July 6, 2007
  68. math

    The difference between two prime numbers is 1985. The larger of these two prime numbers is A. 2431 B. 2002 C. 1987 D. 1986

    asked by Kitty on August 8, 2014
  69. 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
  70. 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
  71. To Ms. Sue

    Ms. Sue Hi! Im not sure if you will be able to help me with this one, since is Math homework, but this time is just to confirm if Im right the question is: What is 1,112,433 rounded to the nearest ten thousand? A. 1,120,000 B. 1,100,000 C. 1,110,000 D.

    asked by Shayna on July 31, 2014
  72. 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
  73. Math

    PLEASE HELP I DON'T KNOW WHAT TO DO D': I don't understand what to do or how to even start.... In the town of Niceville, a local lottery is held once a year for the residents. Lottery tickets cost 50 cents apiece. Each lottery ticket contains four numbers,

    asked by Help on December 30, 2012
  74. math 5th grade

    i need all the prime numbers of 1-100

    asked by albert on November 14, 2008
  75. Math 3rd grade

    Suppose you are comparing two numbers that are greater than 100. You want to find the smaller of the numbers. How many pairs of digits might you have to compare before you have your answer? Explain

    asked by Patty on October 4, 2013
  76. Math

    The digits 1,2,3,4,5,6,7,8,9 are used to form four two-digit prime numbers, with each digit used exactly once. What is the sum of these four primes

    asked by ooooookkkkkk on October 10, 2012
  77. 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
  78. math

    this 7-digit number is 8,920,000 when rounded to the nearest ten thousand. the digits to the tens and hundreds places are the least and same value. the value of the thousands digit is double that of the ten thousands digit. the sum of all its digits is 24.

    asked by bam on September 3, 2014
  79. ALGABRA

    WHAT ARE THE 3 LARGEST PRIME NUMBERS LESS THAN 100?

    asked by HANNAH on September 14, 2008
  80. Maths

    All prime numbers less than ten are arranged in descending order to form a number.Write down the number formed

    asked by Mariam atieno on January 7, 2016
  81. math

    the number has 7 digits it is evenly divided by 00 the value of one of the digits is 60,000 the digit in the hundredth place is both even and prime the digit is the thousands place is 1/2 the value of the digit in the ten thousand place the digit in the

    asked by sonia on August 30, 2012
  82. MATH

    THE VALUE 2 TO THE 8TH POWER - 1 IS DIVISIBLE BY THREE PRIME NUMBERS. WHAT IS THE SUM OF THE THREE PRIME NUMBERS?

    asked by CASSIE on September 12, 2012
  83. math

    Keno is a casino game in which the player has a card with the numbers 1 through 80 on it. The player selects a set of k numbers from the card, where k can range from one to fifteen. The "caller" announces twenty winning numbers, chosen at random from the

    asked by M on October 9, 2011
  84. 4th grade

    Mr. Digit wanted to assign a number to each student in his class. He could only use the digits 2,3 and 6 and each student's number had to have three digits. Can he find enough numbers for all 25 students if repeated digits are allowed? Will there be any

    asked by jessica on January 11, 2010
  85. Math

    Mr. Digit wanted to assign a number to each student in his class. He could only use the digits 2,3,and 6 and each student's number had to have three digits. Can he find enough numbers for all 25 students if repeated digits are allowed? Will there be any

    asked by fko on December 10, 2009
  86. 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
  87. math

    Matt has a magic number basket. The only numbers that can be placed in the basket are numbers that have two, three, or four digits, all the digits must be odd, and the digits must increase from left to right. How many numbers can Matt place in the basket?

    asked by Miep on March 3, 2012
  88. math

    how to use hundreds chart to answer this;(1)what % of the numbers are multiples of 3 (2)what % of the numbers are multiples of both 2 and 3 (3) what% of the numbers are factors of 100 (4)what % of the numbers are prime numbers? i really have no idea how to

    asked by wan on November 12, 2012
  89. 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
  90. Math. Explain

    From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? Consider the possibilities for 5-digit, 4-digit, 3-digit, 2-digit, and 1-digit numbers and repetition of digits. 1,364 1,024 256 A telephone dial has holes numbered from 0 to

    asked by Sebastian on March 26, 2012
  91. 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
  92. math

    Ayan created these clues to discribe her numbers.She used each of the 10 digits 0to 9 once to make the two numbers. It is between 52000 and 2000. there is a 2 in the tenth place. the sum of the digits is 23

    asked by alban on September 13, 2012
  93. Math

    I have a ? that I am kind of stuck on. It says give an infinite list of natural numbers that are not prime. I know half of the numbers are prime and half are not, but I'm not sure how to answer it. Thanks.

    asked by Jon on February 16, 2011
  94. algebra

    2. The sum of both digits, of either of two two-digit numbers, in whatever order the digits are written, is 9. The square of either of the digits of either number, minus the product of both digits, plus the square of the other digit is the number 21. The

    asked by Anonymous on February 15, 2014
  95. math

    the difference between two prime numbers is 1985 the larger of these prime numbers is what

    asked by Anonymous on August 8, 2015
  96. Math

    A number has three distinct digits. The sum of the digits equals the product of the digits. How many three-digit numbers satisfy this condition?

    asked by Ryan on September 4, 2016
  97. MATH

    A number has three distinct digits. The sum of the digits equals the product of the digits. How many three-digit numbers satisfy this condition?

    asked by Jhon on September 4, 2016
  98. Factor Riddles

    I am a prime number less than 100. My digits add to 13. What number am I?

    asked by Emma on September 10, 2016
  99. 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
  100. Math

    Sid wrote 541,309 on his paper. Using numbers and words,explain how the number would change if he exchanged the digits in the hundred thousands and ten places

    asked by Na on September 14, 2016