Question
Find the LCM of 14, 20 and
30.Solution
ATQ, 14 = 2 × 7 20 = 22 × 5 30 = 2 × 3 × 5 LCM = product of all primes with highest powers: = 22 × 3 × 5 × 7 = 4 × 3 × 5 × 7 = 420
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