In a class test, Kate was asked to find the H.C.F of 30 and 42. The correct answer would be:
6

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Solution

The correct option is A 6
Factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30.
Factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42.

Common factors: 1, 2, 3 and 6.
H.C.F = 6
Hence, the HCF of 30 and 42 is 6.

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In a class test, Kate was asked to find the H.C.F of 30 and 42. The correct answer would be:6

The correct option is A 6Factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30. Factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42. Common factors: 1, 2, 3 and 6. H.C.F = 6 Hence, the HCF of 30 and 42 is 6.

In a class test, Kate was asked to find the H.C.F of 30 and 42. The correct answer would be:
6

The correct option is A 6
Factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30.
Factors of 42 = 1, 2, 3, 6, 7, 14, 21, 42.

Common factors: 1, 2, 3 and 6.
H.C.F = 6
Hence, the HCF of 30 and 42 is 6.