The LCM of 12 and 21 is 84. To find the LCM, prime factor both numbers then multiply each factor the most times it was used in either number.
12=2x2x3
21=3x7
lcm=2x2x3x7=84
The Least Common Multiple (LCM) for 12 21 is 84.
The least common multiple of 12 , 21 , 45 = 1,260
The Least Common Multiple (LCM) for 4 12 21 is 84.
Least Common Multiple (LCM) for7 12 21 27is756
The Least Common Multiple (LCM) for 21 15 12 29 is 12,180.
The Least Common Multiple (LCM) for 9 21 10 12 is 1,260.
Least Common Multiple (LCM) for 7 12 21 is 84
The least common multiple of the numbers 468 and 21 is 3,276.
The least common multiple of the numbers 21 and 12 is 84.
420
84
84
252