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Also known (around Coolmath,
anyway) as Guzzinta Tests.
Here are some quick tricks you can learn
to see if a number is divisible (can be divided by) another number.
Huh?
OK... You can see that
18
is divisible by 3...
meaning that
3
goes into
18.
Remember your guzzintas?
That's an easy one, since it's
from our times tables.
But, can you quickly tell if
3
goes into 237?
Without doing long division? I can! And not just because
I'm a super math geek -- because I know some cool tricks!
These are good to learn because they will save you lots of time!
Divisibility by
2
Test:
|
A
number is divisible by
2
if it is even. |
Here's another way to phrase this one:
|
A
number is divisible by
2
if
it's last digit is
0,
2,
4,
6,
or
8 |
Let's do an easy one from our times tables:
Continued on the
next
page
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and distribution and/or downloading of these lessons is strictly
prohibited. |
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