12. What is the least common multiple of 36 and 54?

one hundred and eight

The least common multiple of 54 and 72-

54=2X3X3X3
72=2X2X2X3X3
LCM = 2x2x2x3 = 216

What is the least common multiple of 48 and 72______ ．

48 = 2 × 2 × 2 × 3, 72 = 2 × 2 × 2 × 3 × 3, so the least common multiple of 48 and 72 is 2 × 2 × 2 × 3 × 2 × 3 = 144

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