Factor each one and multiply the prime factors the times it was used the most in any of the numbers.
6=2x3
9=3x3
25=5x5
2x3x3x5x5=450
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The Least Common Multiple (LCM) of (4, 20 and 24) is 120.
The Least Common Multiple (LCM) for 8 4 12 is 24.
Least Common Multiple (LCM) for 21 24 is 168.
The least common multiple is 24. The greatest common factor is 4.
The LCM of 4 and 24 is 24. Since 24 is a multiple of 4, it is automatically the LCM.