Prime Factors, HCF & LCM Quiz
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5 questions, one answer each
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1. Which of these is a prime number?
- A. 9
- B. 15
- C. 17
- D. 21
2. Express 40 as a product of prime factors.
- A. 2^3 x 5
- B. 2^2 x 10
- C. 4 x 10
- D. 2 x 20
3. Find the HCF of 24 and 36.
- A. 6
- B. 8
- C. 12
- D. 72
4. Find the LCM of 8 and 12.
- A. 4
- B. 24
- C. 48
- D. 96
5. Two numbers have HCF 6 and LCM 72. If one number is 24, what is the other?
- A. 12
- B. 18
- C. 24
- D. 36