What is the Highest Common Factor (HCF) of 6 and 12?

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Solution

The correct option is B 6
Factors of 6 are 1, 2, 3 and 6.
Factors of 12 are 1, 2, 3, 4, 6 and 12.

Common factors of 6 and 12 are 1, 2, 3 and 6.

The highest of these common factors is the HCF or the highest common factor of 6 and 12.

$∴$ 6 is the HCF of 6 and 12.

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Find the greatest common factors (GCF / HCF) of the following polynomials :

$12 a x^{2}, 6 a^{2} x^{3} and 2 a^{3} x^{5}$

N_{1} = 2^{55} + 1

N_{2} = 165.

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