







Mutually prime composite numbers 
20150109 

nivedita pose la question : Two composite number that is mutually prime? Penny Nom lui répond. 





GCD (a + b, a  b). 
20090401 

Tomas pose la question : Let a and b integer and relatively prime. Prove that:
GCD (a + b , a  b) = 1 or 2 Stephen La Rocque lui répond. 





Prove that any two consecutive integers are relativley prime. 
20070918 

Michael pose la question : Im not very good at proofs and I was wandering if you would be able to help me with the following question:
Prove that any two consecutive integers is relativley prime.
Thanks a million. Penny Nom lui répond. 





Is c relatively prime to (n.p)? 
20070302 

Andrew pose la question : Please could you help me with a small mathematics problem?! I've put = the problem into three parts but it isn't really three problems; just = one! Given: {[(n.p)^p] / [c + (n.p)]} =3D "an integer" (where c > = (n.p); c and n are integers, n is even and p is an odd prime number) Can one prove that c cannot be relatively prime to (n.p)? { i.e. c = must have the factor (n.p) ?} If so, is the converse also true? {i.e. If c is relatively prime to = (n.p), then [c + (n.p)] cannot be a factor of (n.p)^p ?} Lastly but similarly, if c is relatively prime to a and c > a > = (n.p) ; (c  a) > (n.p) **; and c is not relatively prime to (n.p) = would it be true that (c  a) cannot be a factor (n.p)^p ? I hope my question makes sense? Penny Nom lui répond. 





Show that 3k+2 and 5k+3 are relatively prime 
20070115 

Andrea pose la question : show that if k is a positive integer, then 3k+2 and 5k+3 are relatively prime Penny Nom lui répond. 





How many numbers are relatively prime with 250? 
20060419 

David pose la question : How many positive integers less than or equal to 250 are relatively prime with 250? Stephen La Rocque lui répond. 





Relatively prime 
20030927 

James pose la question : what is the definition a relative prime numbers? Penny Nom lui répond. 





Relatively prime 
20021004 

Natasha pose la question : I really need help with this middle level math question. My little brother is asking me and I have no clue what the answer is. Explain what it means when two numbers are negatively prime. (?) Kathy Nolan and Penny Nom lui répond. 





Two number theory questions 
20010130 

Richie pose la question : i have two questions and they are:  the product of three consecutive prime numbers is 7429. Find the product of the smallest and largest of these three integers.
 the least common multiple of two relatively prime positive integers, a and b, is 144. if a (a>or=2) is as small as possible, compute the value of b.
Penny Nom lui répond. 

