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What is the divisibility rule for 3?

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Question: What is the divisibility rule for 3?

Options:

  1. The last digit must be 0
  2. The sum of the digits must be divisible by 3
  3. The number must be even
  4. The number must end in 3 or 6

Correct Answer: The sum of the digits must be divisible by 3

Solution: 

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

What is the divisibility rule for 3?

Practice Questions

Q1
What is the divisibility rule for 3?
  1. The last digit must be 0
  2. The sum of the digits must be divisible by 3
  3. The number must be even
  4. The number must end in 3 or 6

Questions & Step-by-Step Solutions

What is the divisibility rule for 3?
  • Step 1: Take the number you want to check for divisibility by 3.
  • Step 2: Break the number down into its individual digits.
  • Step 3: Add all the digits together to get a sum.
  • Step 4: Check if the sum you calculated is divisible by 3 (this means it can be divided by 3 without leaving a remainder).
  • Step 5: If the sum is divisible by 3, then the original number is also divisible by 3. If not, it is not divisible by 3.
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