Solution - Least common multiple (LCM)
252
Step by Step Solution
Least Common Multiple is :
252Calculate Least Common Multiple for :
    42, 36 and 21
Factorize of the above numbers :
42 = 2 • 3 • 7
36 = 22 • 32
21 = 3 • 7
Build a prime factors table
|  Prime  Factor  |  Number  42  |  Number  36  |  Number  21  |   L.C.M   (max)  | 
|---|---|---|---|---|
| 2 | 1 | 2 | 0 | 2 | 
| 3 | 1 | 2 | 1 | 2 | 
| 7 | 1 | 0 | 1 | 1 | 
LCM = 22 • 32 • 7
Least Common Multiple is :
252How did we do?
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