Prime and Composite
Numbers
Home Link 2-5
NAME
DATE
TIME
A prime number is a whole number that has exactly two different
factors—1 and the number itself. A composite number is a whole number
that has more than two different factors.
SRB
XXX
For each number:
• List all of its factors.
• Write whether the number is prime or composite.
• Circle all of the factors that are prime numbers.
Number
Factors
Prime or Composite?
1
11
1, 11
prime
2
19
1, 19
prime
3
24
1, 2 , 3 , 4, 6, 8, 12, 24
composite
4
29
1, 29
prime
5
36
1, 2 , 3 , 4, 6, 9, 12, 18, 36
composite
6
49
1, 7 , 49
composite
7
50
1, 2 , 5 , 10, 25, 50
composite
8
70
1, 2 , 5 , 7 , 10, 14, 35, 70
composite
9
100
1, 2 , 4, 5 , 10, 20, 25, 50, 100
composite
Practice
Solve.
10
12
14
64
1,368
7,461 + 2,398 = 9,859
8,158 = 5,071 + 3,087
841 + 527 =
11
13
15
8,322 = 3,263 + 5,059
936 = 4,172 - 3,236
3,742 - 3,349 = 393
4.OA.4, 4.NBT.4, 4.NBT.5, SMP6, SMP7