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Tapia
15 April, 20:29
What is the least common multiple of 20 and 42
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Karen Murphy
15 April, 22:45
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To get the Least Common Multiple (LCM) of 20 and 42 we need to factor each value first and then we choose all the factors which appear in any column and multiply them:
20: 2 2 5
42: 2 3 7
LCM: 2 2 3 5 7
The Least Common Multiple (LCM) is: 2 x 2 x 3 x 5 x 7 = 420
Sorry the chart looks messy - _-
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Ciara Pace
15 April, 23:44
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The answer is 2, because 42/2 is 21, and 20/2 = 10
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