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Factor trees are found to find the LCM. 60 = 30 x 2 = 10 x 3 x 2 = 5 x 2 x 3 x 2 (prime numbers, no further breakdown) 80 = 40 x 2 = 20 x 2 x 2 = 5 x 4 x 2 x 2 = 5 x 2 x 2 x 2 x 2 (prime numbers, no further breakdown) Notice that 5 x 2 x 2 appers in the factor tree for 60 and 80. Times all the factor tree numbers together and cross out 5 x 2 x 2: 3 x 5 x 2 x 2 x 2 x 2 = 240 which is the of 60 and 80 QED.

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14y ago
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14y ago

Multiples of 100- 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000

Multiples of 80- 80, 160, 240, 320, 400, 480, 560, 640, 720, 800

Lowest common multiple is 400

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10y ago

The Least Common Multiple (LCM) for 40 60 is 120.

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13y ago

The LCM is: 240

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11y ago

The LCM is 80.

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10y ago

It is: 1 but the HCF is 20

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8y ago

60.

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7y ago

1200

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Q: What is the least common multiple of 40 60 and 80?
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