Q2 of 55 Page 63

What is the HCF of two consecutive-

(a) numbers?


(b) even numbers?


(c) odd numbers?

(a) Consecutive numbers


Example- 2 and 3


HCF = 1


(b) Even number


Example – 2 and 4


HCF = 2


(c) Odd numbers


Example – 3 and 5


HCF = 1


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Find the HCF of the following numbers:

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HCF of co-prime numbers 4 and 15 was found as follows by factorization: 4 = 2 × 2 and 15 = 3 × 5 since there is no common prime factor. So, HCF of 4 and 15 is 0. Is the answer correct? If not, what is the correct HCF?

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