Transcript Factor Rainbows

Factor Rainbows
A colorful way to find the factors of given numbers
Some important Definitions!
•
Factor - a number that is MULTIPLIED to get a
given product
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Product - the answer to a multiplication problem
So you've been given a
number
•
Let's go with twenty
Making Rainbows
Always start with 1 and the number itself
Connect the numbers with a rainbow arc
Work your way
up from left to
right getting
bigger
So after 1 comes 2
If it's an even number
2x10=20
Connect these with another rainbow arc
You may have noticed
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As you work your way from right to left...
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The numbers get smaller
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Working your way to the middle until you run out
of numbers
After 2 comes 3
But 3 is not a factor
Moving on up to 4
Yup, 4x5=20
Write them down; Draw the arc
There is no
number
between 4 and
5
So you are done!!!
So this is your factor rainbow for 20
The factors of 20 are...
1, 2, 4, 5, 10, & 20