If p and q are co-primes, then p7 and q9 are:

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RRB Group D 29 Sept 2022 Shift 2 Official Paper
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  1. composite numbers, but not co-primes
  2. co-primes, and composite numbers
  3. primes 
  4. co-primes, but not composite numbers

Answer (Detailed Solution Below)

Option 2 : co-primes, and composite numbers
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Detailed Solution

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Given:-

p and q are co-primes.

Calculation:-

We know that the co-prime numbers have no factor in common, or, their HCF is 1.

Thus, p7 and q9 have the same factors with exponents of p and q respectively, which again will not have any common factor.

Thus we can conclude that p7 and q9 are co-prime numbers and composite numbers.
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