Find by inspection HCF of following numbers 10 and 15

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Solution

Highest common factor, i.e. HCF of 10 and 15.
Factors of 10 and 15:
Factors of 10 = 1, 2, 5, 10
Factors of 15 = 1, 3, 5, 15
Therefore, the HCF of 10 and 15 is 5.

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