Question

What is the LCM Of 20 and 3
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Answer 1

LCM of 20 and 3 is 60

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Answer 2

$factors \\ 20 = 20 - 40 - 60 - 80 - 100 \\ 3 = 24 - 27 - 30 - 33.........45 - 48 - 51 - 54 - 57 - 60 - 63... \\ so \: we \: can \: see \: that \: the \: first \: common \: factor \: is \: 60 \\ thus \: lcm \: = 60$