Question : What is the LCM of 120 and 450?
Option 1: 2400
Option 2: 1800
Option 3: 3600
Option 4: 4800
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Correct Answer: 1800
Solution : 120 = 2 × 2 × 2 × 3 × 5 450 = 2 × 3 × 3 × 5 × 5 LCM of 120 and 450 is (2 × 2 × 2 × 3 × 3 × 5 × 5) = 1800 i.e. 1800 is the least common multiple of 120 and 450. Hence, the correct answer is 1800.
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