Q.

State true or false:

If p and q are co-prime numbers, then p2 and q2 are co-prime.

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a

True

b

False 

answer is A.

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Detailed Solution

We have to check whether p2 and q2are co-prime if p and q are co-prime numbers.
That means if a and b are co-prime. Then,
HCF(a,b)=1
HCF(a2,b2)=HCF(a,b)
As co-prime numbers have only 1 as a common factor, p and q have no common factors other than 1.
HCF(p,q)=1
HCF(p2,q2)=1
So, p2 and q2 have no common factors other than 1.
That means p2 and q2 are co-prime.
Therefore, it is true that if p and q are co-prime numbers, then p2 and q2 are co-prime.
Hence, option 1 is correct.
 
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