Find the HCF of 45 and 40.

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Solution

The correct option is B 5
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Factors of 45: 1, 3, 5, 9, 15, 45

The common factors are 1 and 5 and the HCF is 5.

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