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