Divisibility means a whole number can be divided by a natural number to get a whole number as the quotient with no remainder. For example: 6÷3=2. The quotient 2 is a whole number. So we can say 6 is divisible by 3. However 12÷5=2 2/5. The quotient 2 2/5 is not a whole number so 12 is not divisible by 5. Let’s get into some of the tricks now. Divisibility by 3 and 9 Add all the digits of the number to get a.

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