Question 64

What is the HCF of 20, 250 and 120?

Solution

$$20=2\times\ 2\times\ 5$$

$$250=2\times5\times5\times5$$

$$120=2\times2\times2\times3\times5\ $$

HCF means Highest Common Factor of the given numbers. So here 2 and 5 are common in the factor of all three numbers.

Hence HCF (20, 250 and 120) = $$2\times5$$

= 10

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