Today while I was teaching math to Nicole I came across a chart filled with tricks for figuring out single digit factors of divisibility. I knew the tricks for 2, 5, 9 and 10 (which is not a single digit...I know.) BUT, I did not know there are tricks for 3,4,6 and 8. SO, I'm going to share the awesomeness with you! You are welcome.

TESTS FOR DIVISIBILITY

a number can be divided by...

2 if the last digit can be divided by 2.

4 if the last two digits can be divided by 4.

8 if the last three digits can be divided by 8.

5 if the last digit is 0 or 5.

10 if the last digit is 0.

3 if the

**sum of the digit**s can be divided by 3.

6 if the number can be divided by 2

**and**3.

9 if the

**sum of the digits**can be divided by 9 (or if the equal nine with adding all numbers until a single digit. 2439 2+4+3+9=18 1+8=9.)

There is no simple test for divisibility by 7. LAME!

But how awesome is that?

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