LilibethT479615 LilibethT479615

26-10-2022
Mathematics

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(a) Write 140 as a product of prime factors. (b) Find the lowest common multiple (LCM) of 84 and 140.

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JamelN337831 JamelN337831

26-10-2022

[tex]\begin{gathered} \text{Prime Factor of }140 \\ \\ 140=2\times2\times5\times7 \end{gathered}[/tex]

By listing the multiples of 84 and 140, we have

Multiples of 84 → 84, 168, 252, 336, 420, 504

Multiples of 140 → 140, 280, 420, 560

Therefore, the LCM of 84 and 140 is 420.

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