Unit Review: Primes, factors & multiples

F.1Answer yes or no.

1. 1
   Is 3 a factor of 47? 
2. 2
   Is 3 a factor of 10? 

F.2List the factors from least to greatest.

1. 3
   List all the factors of 91.
2. 4
   List all the factors of 69.

F.3List all the factor pairs.

1. 5
   List all the factor pairs of 82.
2. 6
   List all the factor pairs of 78.

F.4List the multiples.

1. 7
   List the first five multiples of 12.
2. 8
   List the first five multiples of 15.

F.5Find the least common multiple.

1. 9
   Find the least common multiple (LCM) of 4 and 9.
2. 10
   Find the least common multiple (LCM) of 5 and 7.

F.6Use the divisibility rules for 2, 3, 5, 9, and 10. When asked which divide a number, list all of them.

1. 11
   Is 45,927 divisible by 9? 
2. 12
   Is 504 divisible by 9? 

F.7Write prime or composite.

1. 13
   Is 3 prime or composite?
2. 14
   Is 52 prime or composite?

F.8Write each number as a product of prime numbers.

1. 15
   Write the prime factorization of 56.
2. 16
   Write the prime factorization of 6.

F.9Answer each question.

1. 17
   Write the prime factorization of 55.
2. 18
   Write the prime factorization of 33.

F.1Identify Factors

1. 1no
2. 2no

F.2List the Factors

1. 31, 7, 13, 91
2. 41, 3, 23, 69

F.3Factor Pairs

1. 5$1\times 82$, $2\times 41$
2. 6$1\times 78$, $2\times 39$, $3\times 26$, $6\times 13$

F.4Identify Multiples

1. 712, 24, 36, 48, 60
2. 815, 30, 45, 60, 75

F.5Least Common Multiple

1. 936
2. 1035

F.6Divisibility Rules

1. 11yes
2. 12yes

F.7Prime or Composite

1. 13prime
2. 14composite

F.8Prime Factorization

1. 15$2\times 2\times 2\times 7$
2. 16$2\times 3$

F.9Prime & Composite Numbers

1. 17$5\times 11$
2. 18$3\times 11$