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Q: What is the hcf for 21 and 49?

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The GCF is 7.

21

If you mean: 21, 49 and 84 then the HCF is 7

49 = 7 x 7, 21 = 7 x 3, 91 = 7 x 13. HCF is 7

The first step when finding an HCF is to break the numbers down into their prime factors. In this case we get: 21 = 3x7 49 = 7x7 The next step is to identify any common prime factors. In this case both numbers have a 7 as a prime factor. There are no more common prime factors, and thus the HCF of 21 and 49 is 7.

The GCF is 7.It is: 7

The GCF of 21, 49, and 84 is 7.

7

HCF is the highest common factor of two or more numbers. HCF of 56 and 49 is 7.

If you mean 28, 49 and 84 then the hcf is 7

The GCF is 21.

the answer is 49

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