Question

if two positive integers are written as a and b "a"= x4 y3 b= x5 y2 .x and y are prime numbers then HCF(ab) is :
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Answer 1

Answer:

Greatest common divisor (GCD) of and obviously must be a divisor of both and , which means that and must be an integer.

If (option C), then , which means that cannot be GCD of and as it is not a divisor of .

Answer: C.

How about the other choices, can they be GCD of and ?

A. --> if --> and --> . Answer is YES, can be GCD of and ;

B. --> if and --> and --> . Answer is YES, can be GCD of and ;

D. --> if and --> and --> . Answer is YES, can be GCD of and ;

E. --> if and --> and --> . Answer is YES, can be GCD of and .

Hope it's clear.

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