What is the LCM of 4 and 5?
- A.9
- B.10
- C.20 ✓
- D.40
Explanation: Multiples of 4: 4,8,12,16,20. Multiples of 5: 5,10,15,20. Smallest common multiple is 20.
Class 6 IMO Mathematics Olympiad practice · Number Sense · Factors, Multiples & Primes
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