56 and 63 are not co-prime. The prime factorization of 56 is 2³ × 7 and that of 63 is 3² ×7. Both share the common factor 7, disqualifying co-primality.
Class 6 Mathematics Ganita Prakash Prime Time
Class 6 Mathematics Chapter 5 Prime Time question answer
To check co-primality, find the prime factorization of both numbers. For 56, it is 2³ × 7 for 63, it is 3² ×7. The shared factor 7 makes their greatest common divisor (GCD) 7, indicating they are not co-prime. Co-prime numbers must have no common factors other than 1, which is not the case here due to their overlap in the factor 7.
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