Factors & Multiples
List the first four multiples of 10.
10, 20, 30, 40
Give an example of a prime number.
Examples include: 2, 3, 5, 7, 11, ...
(any number that has exactly two factors: 1 and itself)
Find the Greatest Common Factor of 12 and 8.
Factors of 12: 1, 2, 3, 4, 6, 12
Factors of 8: 1, 2, 4, 8
4 is the Greatest Common Factor!
List the first five multiples of 6.
6, 12, 18, 24, 30
Find the prime factorization of 30.
2 x 3 x 5
Find the Least Common Multiple of 6 and 10.
Multiples of 6: 6, 12, 18, 24, 30, ...
Multiples of 10: 10, 20, 30, ...
30 is the Least Common Multiple!
List all the factors of 24.
1, 2, 3, 4, 6, 8, 12, 24
Find the prime factorization of 63.
3 x 3 x 7
Lin is putting stickers on some of the lockers in her middle school’s hallway. She puts a skateboard sticker on every 4th locker, and a soccer sticker on every 5th locker.
What locker will be the first to get both stickers?
Skateboard stickers: 4, 8, 12, 16, 20, ...
Soccer Stickers: 5, 10, 15, 20, ...
The first locker to get both will be locker 20
List all the factors of 56.
1, 2, 4, 7, 8, 14, 28, 56
Find the prime factorization of 80.
2 x 2 x 2 x 2 x 5
During a school chorus concert, students from elementary and middle schools will be grouped together for their performances. There are 32 elementary students and 40 middle school students. The director wants identical groups for the performances, with students from both schools in each group.
What is the largest number of groups that can be formed?
Factors of 32: 1, 2, 4, 8, 16, 32
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
The largest number of groups that can be formed is 8