# 15

### Mrs. Florence

## Mathematical facts:

- 15 is composite because it has more than 2 factors.
- The factors of 15 are 1,3,5,15.
- 15 is odd because it is not divisible by 2 and it ends in and odd number.
- The prime factorization for 15 is 3 X 5.
- 15 is not square because there is no number times itself to get 15.

## Fun Facts

- A backgammon game includes 15 stones for each person
- February 15 is my birthday
- In cribbage you get 2 points for playing the card that makes 15
- In music there are 15 major scales
- Congress adopted a new flag of 15 stars and 15 stripes in 1795, to give representation to the two new states admitted into the Union, Vermont and Kentucky.

## Greatest Common Factor of 15 and 24

15: 1,

__,5,15__**3**24: 1,2,__ 3__,4,6,8,12,24

## prime factorization 15= 3 X 5 | A quarter of an hour is 15 minutes. | ## US flag When two states joined the Union, the flag was made with 15 stars and stripes. |