Question

HCF of co-prime numbers 10 and21 was found as follows by factorisation:10= 2×5 and21=3×7,since there is no common prime factor, so HCF of10and 21 is 0. Is this answer correct? If not justify your answer.

Answer 1

Answer:

Co-prime numbers are the numbers which have only 1 as a common factor. Every number has 1 as a factor. Therefore both 10 and 21 have 1 as a factor. Thus, 1 is the HCF of 10 and 21 so, 0 is not their HCF!

Step-by-step explanation:

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