The LCM is: 12,870
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The LCM of 18 36 and 78 is 468.
13 is the GCF. 78 is the LCM.
The least common multiple of the numbers 78, 90 and 140 is 16,380.
The least common multiple is the smallest positive number that is a multiple of two or more numbers. 2: 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90 5: 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90 6: 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90 9: 18, 27, 36, 45, 54, 63, 72, 81, 90. The least common multiple for 2, 5, 6 and 9 and is 90.
There are 78 girls in the school. 66+12=78