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March 28, 2015

Homework Help: lcm

Posted by tayloir on Sunday, April 22, 2007 at 10:05pm.

find the least common mutlipe of 420 196

Break down each number into prime number factors

196 = 2*2*7*7
420 = 70*2*3 = 2*2*3*5*7

The least common multiple is the product of all prime factors that occur in both numbers
2*2*3*5*7*7 = 2940

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