Prime and Composite (5.5 c)
- 1. Which is a prime factor of the composite number 16?
A) 3
B) 4
C) 8
D) 2
- 2. Which is a prime factor of the composite number 24?
A) 8
B) 4
C) 9
D) 3
- 3. Which is a prime factor of the composite number 36?
A) 9
B) 3
C) 13
D) 23
- 4. Which is a prime factor of the composite number 45?
A) 2
B) 5
C) 9
D) 15
- 5. Which is a prime factor of the composite number 20?
A) 3
B) 4
C) 5
D) 10
- 6. Which is a prime factor of the composite number 39?
A) 6
B) 11
C) 13
D) 9
- 7. Which is a prime factor of the composite number 254?
A) 103
B) 117
C) 133
D) 127
- 8. Which is a prime factor of the composite number 291?
A) 97
B) 87
C) 117
D) 73
- 9. Which is a prime factor of the composite number 66?
A) 7
B) 5
C) 11
D) 6
- 10. Which is a prime factor of the composite number 78?
A) 37
B) 39
C) 13
D) 34
- 11. Which is a prime factor of the composite number 147?
A) 7
B) 5
C) 9
D) 49
- 12. Which is a prime factor of the composite number 57?
A) 19
B) 29
C) 39
D) 9
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