A colorful way to find the factors of given numbers 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 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
Connect these with another rainbow arc 2x10=20 Connect 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
Write them down; Draw the arc 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