A number is divisible by 5 and 6. It may not be divisible by


A number is divisible by 5 and 6.


Let number be a = 5× 6× b (where b is any random number)


A. a = 5× 6× b


= 5× 2× 3× b


= 10× 5× b


Hence, it is divisible by 10.


B. a = 5× 6× b


= 5× 2× 3× b


= 2×15× b


Hence, it is divisible by 15.


C. a = 5× 6× b


= 30× b


Hence, it is divisible by 30.


D. a = 5× 6× b


= 30× b


It can’t be written as 60× b and hence it may not divisible by 60.

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