Question

Divisibility rule by 3

Answer 1

 The Rule for 3: A number is divisible by 3 if the sum of the digits is divisible by 3. ... This means that we need to add up the digits in the number and see of the answer is can be divided by 3 without a remainder.

Answer 2

The rule is that the sum of the digits of the number is either equal to or divisible by 3.

Let's take 243

2+4+3=9

And 9 is divisible by 3

Therefore 243 is divisible by 3


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