Question 1 (c)

Find the H.C.F. of the following numbers:
18, 60

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Solution

HCF of two or more number is the highest number which divides the given numbers exactly.
Factors of 18 = $2 \times 3 \times 3$
Factors of 60 = $2 \times 2 \times 3 \times 5$
HCF of 18, 60 = $2 \times 3 = 6$

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