Factor Rainbows

Factor RainbowsA colorful way to find the factors of given numbers

Some important Definitions!

• Factor - a number that is MULTIPLIED to get a given product

• Product - the answer to a multiplication problem

So you've been given a number

• Let's go with twenty

Making RainbowsAlways start with 1 and the number itselfConnect the numbers with a rainbow arc

Work your way up from left to right

getting bigger

So after 1 comes 2If it's an even number

2x10=20Connect these with another rainbow arc

You may have noticed

• As you work your way from right to left...• The numbers get smaller• 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 4Yup, 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