Question

Find lcm of 120 and 70 by fundamental theorem of arithmetic

Answer 1

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$120 = 2 {}^{3} \times 3 \times 5 \\ 70 = 2 \times 5 \times 7$
therefore by FUNDAMENTAL THEORM OF ARITHMETIC
$l cm \: of \: 120 \: and \: 70 \\ = 2 ^{3} \times 3 \times 5 \times 7 \\ = 840$
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