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Question
Find the LCM of 231 and 396 by prime factorisation method.
Sum
Solution
231 = 3 × 7 × 11
396 = 22 × 32 × 11
L.C.M = 22 × 32 × 7 × 11
= 4 × 9 × 7 × 11
= 2772
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