Mathnasium #MathTricks: Divisibility (Rule for 3s)

Oct 29, 2021

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

To determine if the number 87 is divisible by 3, we find the sum of its digits. Eight plus seven gives us a final sum of fifteen. Fifteen is divisible by 3. So,

87 is divisible by 3.

SEE HOW MATHNASIUM WORKS FOR YOUR SITUATION

Answer a few questions to see how it works

My Child is:

Advanced in Math

Doing Ok, Could Do Better

Struggling with Math

OUR METHOD WORKS

Mathnasium meets your child where they are and helps them with the customized program they need, for any level of mathematics.

Find Their Path

HELP YOUR CHILD ACHIEVE THEIR FULL MATH POTENTIAL

We have over 1,000 centres. in North America. Get started now.

Find a location
Get a math skills assessment for your child
Your child will complete a customized learning plan

Get Started By Finding A Local Centre

Mathnasium #MathTricks: Divisibility (Rule for 3s)

SEE HOW MATHNASIUM WORKS FOR YOUR SITUATION

Answer a few questions to see how it works

My Child is:

SEE HOW MATHNASIUM WORKS FOR YOUR SITUATION

Answer a few questions to see how it works

My Child is:

OUR METHOD WORKS

Related Articles

Halloween 2024: Mystery Colouring and Graphing Activities!

Math Activities

Math Resources

HELP YOUR CHILD ACHIEVE THEIR FULL MATH POTENTIAL

We have over 1,000 centres. in North America. Get started now.