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1. What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30?
- A. 196
- B. 196
- C. 196
- D. 196
Answer: Option B
Explanation:
The number would be that L.C.M of 12, 18, 21, 30 and divided by two.
L.C.M = 2 × 3 × 2 × 3 × 7 × 5 = 1260
The number = 1260÷ 2 = 630
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