Question

What is the test to check whether a number is divisible by 3?

Answer 1

Step-by-step explanation:

Divisibility by 3 or 9

First, take any number (for this example it will be 492) and add together each digit in the number (4 + 9 + 2 = 15). Then take that sum (15) and determine if it is divisible by 3. The original number is divisible by 3 (or 9) if and only if the sum of its digits is divisible by 3 (or 9).

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Answer 2

Hey there, here's your answer:

To check whether a number is divisible by 3, you have to add all the digits of the number, and the sum obtained should be divisible by 3.

Let's take two examples:

1. 41984

=4 + 1 + 9 + 8 + 4

=26

But as we know, 26 is not a multiple of 3 so the number 41984 is not divisible by 3.

2. 39132

=3 + 9 + 1 + 3 + 2

=18

We know that 18 is a multiple of 3 (3x6), so the number 39132 is divisible by 3.

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