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Algebra: Divisibility and Prime Numbers

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Question 234957: The greatest common factor of 72 and X is 3. The least common multiple of 72 and X is 1800. What must be true?
a) X is less than 72
b) X is multiple of 5.
c) X is a multiple of 72.
d) X is a factor of 3.
e) X is even

Click here to see answer by jsmallt9(511)

Question 234483: what is product of the divisors of 1000 (including 1 and 1000)?
a) 10^24 b) 10^16 c) 10^8 d) 10^30 e) 10^32
Click here to see answer by Edwin McCravy(2878)

Question 233431: What is the largest prime factor of ( 30^2 - 7^2 ) ?
Click here to see answer by Alan3354(5863)

Question 233402: If n is a whole number then the largest number that n(n+1)(2n+1) is divisible by for all n is
a) 2 b) 6 c) 10 d) 3 e) none

Click here to see answer by jsmallt9(511)

Question 232799: What two-digit positive integer is one more than a multiple of 2, 3,4, 5 and 6 ?
Click here to see answer by ankor@dixie-net.com(6567)

Question 232459: which of the following groups of numbers are all prime numbers?
a)2,3,5,9
b)3,11,23,31
c)2,5,15,19
d)7,17,29,49
Click here to see answer by stanbon(25959)

Question 232460: which of the following groups of numbers are all prime numbers?
a)2,3,5,9
b)3,11,23,31
c)2,5,15,19
d)7,17,29,49
Click here to see answer by rfer(2588)

Question 232017: Use the following list of numbers for exercises 13 and 15.
0, 1, 15, 19, 23, 31, 49, 55, 59, 87, 91, 97, 103, 105
13. Which of the given numbers are prime?
15. List all the prime numbers between 30 and 50.

Click here to see answer by stanbon(25959)

Question 228978: -5/8 divided by 3/4
Click here to see answer by rfer(2588)

Question 228978: -5/8 divided by 3/4
Click here to see answer by CassieLynn(3)

Question 228338: Word problems over prime factorization or factoring the monomial.
Problem 1:::: You are arranging 70 plants in a rectangular garden with the same number of plants in each row. How many ways can you arrange the garden?
Problem 2:::: A dog kennel groups the dogs in order to determine at what time they will be given a treat. Each group should have the same number of dogs. There are 120 dogs in the kennel. How many groups are possible?
Click here to see answer by stanbon(25959)

Question 228805: What is the first three digit prime number?
Click here to see answer by nerdybill(2413)

Question 227613: write the provided fraction in simplest form.
60a2b/36ab3
Click here to see answer by user_dude2008(690)

Question 227612: write the prime factorization of the provided number
504
Click here to see answer by user_dude2008(690)

Question 227608: write the provided improper fraction as a mixed number or a whole number
149/143
Click here to see answer by user_dude2008(690)

Question 227267: write a 4 digit number that is divisible by both 6 and 9. Explain how you know without dividing that it is divisible by both 6 and 9.
Click here to see answer by solver91311(4818)

Question 227267: write a 4 digit number that is divisible by both 6 and 9. Explain how you know without dividing that it is divisible by both 6 and 9.
Click here to see answer by Theo(547)

Question 227124: how many two digit prime numbers have a remainder of 2 when divided by 7?
Click here to see answer by solver91311(4818)

Question 226910: is 450 divisible by 5, 9, 10
Click here to see answer by Alan3354(5863)

Question 226645: 5= n dived by 6
Click here to see answer by rfer(2588)

Question 226491: dividing polynomials
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Question 226428: What is the least number greater than 1,000 divisible by 10?
Click here to see answer by jim_thompson5910(13679)

Question 226094: find the prime factorization of 125
Click here to see answer by checkley77(6671)

Question 225540: I am having a hard time in Math class, can someone please help me..
X2-X=41
Select some numbers for X, substiute them in formula, and see if prime number occur. Try to find a number for X that when subsituted in the formula yields a composite number. I must substitute at least 5 numbers; 0 (zero), 2 even and 2 odd into the equation for x. I have to show all stepsThe symbols ^ and * should not be used I am so lost can someone please help me..

Click here to see answer by Alan3354(5863)

Question 225297: What is the greatest prime you must consider to test whether 503 is prime?
I tried the smaller numbers, 2, 3, 5, 7 and then looked at a prime chart and it said it was prime, but how do I test it and choose the greatest prime?
Click here to see answer by ankor@dixie-net.com(6567)

Question 223547: What is the prime factorization of 999 to the 10th power?
Please help! :)
Click here to see answer by jsmallt9(511)

Question 223539: What is the greatest prime you must consider to test whether 503 is prime? Why?
Please help! :)
Click here to see answer by jsmallt9(511)

Question 224166: If a man buys two products by the pound and pays $0.26 for one and $0.19 for the other. His total amount payed is $10,530.03 and his total Weight is 42,110 pounds. What is the weight of product bought at $0.26 and what is the weight of product bought at $0.19 ??? Please help!
Click here to see answer by checkley77(6671)

Question 224158: There are 184 basketball fans who plan to go to a game. How many buses will be needed, given that each bus can hold 31 fans?

Click here to see answer by checkley77(6671)

Question 223330: wht the gcf of 24 30 and 60
Click here to see answer by Alan3354(5863)

Question 223330: wht the gcf of 24 30 and 60
Click here to see answer by rfer(2588)

Question 223199: Find the greatest four-digit number that has exactly 3 positive factors.
Click here to see answer by user_dude2008(690)

Question 222948: having problem solving to algebra problems
1. 18 + (5/6) r=0

2. 3x + (2/3) = 5/6
Click here to see answer by nerdybill(2413)

Question 222183: is 450 divisable by 5, 9, and 10?
Click here to see answer by Edwin McCravy(2878)

Question 221968: what is the prime factorization for 300
Click here to see answer by solver91311(4818)

Question 221195: please help me with this question
what are six pairs of prime nubers with a sum of 90?
Thank you.
Click here to see answer by Alan3354(5863)

Question 220673: Question from my textbook and I am having a hard time.
Name the greatest 4-digit number that is divisible by 2, 3, and 5.
Click here to see answer by Alan3354(5863)

Question 219070: write an equation that shows 84 as a product of prime factors. Then use your equation to help you find 84 divided 12 and 84 divided 21.
Click here to see answer by user_dude2008(690)

Question 218417: choose the number that is divisible by four different prime numbers 77, 105, 225, and 1,155.
Click here to see answer by checkley77(6671)

Question 217800: what is 21 divided to 4897
what is 81 divided to 4561
what is 42 divided to 9287
Click here to see answer by rfer(2588)

Question 213961: is 27 prime or compsite or neither
Click here to see answer by harperstephanies(1)

Question 217225: what is the least positive interger divible by 1 to 9
Click here to see answer by jim_thompson5910(13679)

Question 169424: i am a multiple of 5 between 100 and 200 that is divisible by 3,4, and, 6 who am i
Click here to see answer by Studenttt(8)

Question 216684: what are the factors of 875
Click here to see answer by drj(1380)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675