What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ? A. 196 B. 1260 C. 630 D. 2520 Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation 12 = 2 × 2 × 3 18 = 2 × 3 × 3 21 = 3 × 7 30 = 2 × 3 × 5 L.C.M. of 12, 18, 21 30 = 2 × 3 × 2 × 3 × 7 × 5 = 1260 Required number = 1260/2 = 630 Workspace
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