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Coolmath Pre-Algebra
Prime and Composite Numbers lesson 1 - Divisibility Tests  
(page 2 of 11)
---- This pre-algebra lesson explains how to use divisibility tests.

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Here's a harder one:

Does 2 go into 25,014? ( Is 25,014 divisible by 2? )
Yep, since the last digit is 4. ( It's even. )

 

What about this one?

Does 2 go into 619? ( Is 619 divisible by 2? )
No! The last digit is 9 and it's not an even number.

 

Divisibility by 5 Test:

A number is divisible by 5
if the last digit is 0 or 5.


This one's a piece of cake!  (OK, now I'm hungry.)

Here's one from our times tables:

Does 5 go into 35? ( Is 35 divisible by 5? )
Yep! The last digit is 5. ( And we know that 35 / 5 = 7 . )

Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
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