Question

What is the rule to check if a number is divisible by 3?

Options

• The last digit should be divisible by 3

• The sum of digits should be divisible by 3

• The first digit should be divisible by 3

• The number should end with 3, 6, or 9

Answer 1

The sum of digits should be divisible by 3

Explanation:

A number is divisible by 3 if the sum of all its digits is divisible by 3.