
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 
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 
math
For the numbers from 100 through 199, how many have different digits in increasing order?
asked by Jody on May 4, 2011 
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 15, 2014 
math
While adding ten twodigit 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 13, 2014 
math
While adding ten twodigit 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 
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 
math
The digits 2, 4, 6, 8 and 0 are used to make fivedigit numbers with no digits repeated. What is the probability that a number chosen at random from these numbers has the property that the digits in the thousands place and ten's place are each larger than
asked by Alex on December 11, 2018 
Number Sentence
In a 4digit number, the two greatest placevalue 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 
Math
Rob used all the digits except 0 to write a 9digit counting number such that no two consecutive digits form a 2digit prime number. (That is, for the number abc,def,ghi, where letters stand for unique digits, none of the following 2digit numbers are
asked by PT on January 16, 2019 
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 
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 
Math
What are 2 prime numbers between 100199 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 23, 2013 
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 
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 
Calculus
What is the largest two digit prime number whose digits are both prime numbers?
asked by Ashley on January 26, 2008 
Math
Find all the two digit prime numbers neither of whose digits are prime.
asked by Diana on March 14, 2011 
math
The Florida Lottery is made up of the numbers 149. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 149: 2.What is the probability of a prime number being picked randomly from the numbers 149?
asked by Anonymous on January 17, 2010 
math
The Florida Lottery is made up of the numbers 149. My mother has observed that the winning numbers many times are prime numbers. 1.List the prime numbers from 149: 2.What is the probability of a prime number being picked randomly from the numbers 149?
asked by Anonymous on January 17, 2010 
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 1999 on a piece of paper, (1234567891011121314151617181920...998999) what will the 2006th digit from the
asked by courtney on October 16, 2008 
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 
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 
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 
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 11, 2012 
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 16, 2010 
math
the florida lottery is made up of the number 149. my mother observed that the winning numbers many times are prim numbers. a. list the prime numbers from 149 b. what is the probability of a prime number being picked randomly from the numbers 149? c. is
asked by ssmomo on February 1, 2010 
Math
* How many different odd 3digit 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 
java/programming Please Help Me!!
how do i write java loop program where the user enters 10 random numbers. the program then collects the prime numbers from that 10 random numbers and adds all the prime numbers and prints the sum of the prime numbers. if the number 13 is entered, the loop
asked by ghost on February 17, 2019 
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 
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 
maths
Find mean of first ten prime numbers.
asked by Tarandeep on February 18, 2017 
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 29, 2013 
Math
What is the sum of all prime numbers less than 500 with only 3s and 4s as digits
asked by Mags on January 10, 2017 
Algebra
For how many twodigit prime numbers is the sum of its digits 8?
asked by Jack on April 14, 2011 
math
(1)I am thinking of a 5digit 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 
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 
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 
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 
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 
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 
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 29, 2017 
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 12, 2013 
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 
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 
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 10, 2012 
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 
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 9, 2010 
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 
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 August 31, 2006 
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 3digit numbers that are prime and all rearrangements of their digit are also prime
asked by Kris on November 30, 2008 
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 
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 
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 18, 2009 
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 Anonymous on November 13, 2018 
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 
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 18, 2017 
Math
A positive integer n is defined as a "prime interlude" if n1 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 9, 2007 
math
write all the possible odd 5digit numbers using the digits 1,4,7,8 and 0, with the 1 in the ten thousands places.
asked by lindsey on August 24, 2016 
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 4digits 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 
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 
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 11, 2010 
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 fivedigit 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 
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 
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 
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 27, 2011 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
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 
math 5th grade
i need all the prime numbers of 1100
asked by albert on November 14, 2008 
Math
The digits 1,2,3,4,5,6,7,8,9 are used to form four twodigit prime numbers, with each digit used exactly once. What is the sum of these four primes
asked by ooooookkkkkk on October 10, 2012 
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 18ft pieces or a whole number
asked by anonymous on February 17, 2011 
math
this 7digit 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 2, 2014 
ALGABRA
WHAT ARE THE 3 LARGEST PRIME NUMBERS LESS THAN 100?
asked by HANNAH on September 14, 2008 
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 29, 2012 
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 
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 11, 2012 
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 
Math
Composite digits to prime digits in 638,527 Would this be No
asked by Johnnie on January 16, 2019 
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 
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 
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 
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 
java/programming
Please help me, its emergency!!! The 10 numbers will be collected from the keypad using a loop. If the number entered is a prime only, that number will be added. How do I write a Java program to input 10 prime numbers and print the sum?
asked by Anonymous on February 14, 2019 
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 
Math. Explain
From the digits 1, 2, 3, and 4, how many positive integers are less than 100,000? Consider the possibilities for 5digit, 4digit, 3digit, 2digit, and 1digit 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 
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 12, 2012 
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 
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 
algebra
2. The sum of both digits, of either of two twodigit 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 14, 2014 
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 15, 2011