What is the Factor tree for 90?

Answer 1

a factor is actually like a tree with branches.

just divide 90 by prime whole numbers until you get all prime numbers.

first divide 90 by 2

90/2 = 45 [2 is a prime whole number]

45/5 = 9 [5 is a prime whole number]

9/3 = 3 [3 is a prime whole number]

since your last number is 3 you cant divide anymore to get a smaller prime whole number.

so now use the numbers you have... 90,45,9,2,3,3, and 5 to make your factor tree.

start with 90 at top. make two branches with 45 and 2 on the ends. make two more branches from 45 with 9 and 2 on the ends. make two more branches from the 9 with a 3 and 3 on the ends. all of the ends of your branches now have prime whole numbers and you are finish!
90

45,2

15,3,2

5,3,3,2