The LCM of 3, 4, and 7 is 84, which is the multiple of the highest power of prime factors from both numbers (2 x 2 x 3 x 7 = 84).
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The LCM of 2 and 3 is 6. The LCM of 2 and 4 is 4. The LCM of 5 and 7 is 35. The LCM of 7 and 9 is 63.
2^6 3^7 5 26375
The LCM of 4, 7 and 9 is 252. Diagram it however you wish.
The Least Common Multiple (LCM) for 4 10 7 is 140.
The LCM is 168.