The HCF of $100$ and $101$ is:

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1

7

37

None of these

answer is A.

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Detailed Solution

Given numbers are 100 and 101.
By observation given numbers

100

and

101

are consecutive numbers and even and odd numbers, respectively. This means the given numbers are co-prime.
We know that the H.C.F of consecutive numbers is 1.
So, the HCF is

1

.
Hence, option 1 is correct.

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