Which of the following numbers completely divides 225?

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Solution

The correct option is C 3
225 is an odd number. Hence it is not divisible by 2.

We know that if a number is not divisible by 2, it cannot be divisible by 6.

(2 + 2 + 5) = 9
9 is divisible by 3. Hence 225 is divisible by 3.

The number formed by last 2 digits is 25 and 25 is not divisible by 4. Hence 225 is not divisible by 4 either.

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