84, 168, 252, 336, 420, 504, 588, 672
147, 294, 441, 588, 735
Common multiples include 588, 1176, 1764 and so on.
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The Least Common Multiple of 21, 63, 147: 441
The least common multiple of the numbers 147 and 20 is 2,940.
The GCF is 21.
Yes, 84 is a multiple of 7 because 7*12 = 84
Yes, 84 is the 12th multiple of 7. i.e. 7 x 12 = 84