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Write down the factors of each number.

Hence

3 = 1,3

4 = 1,2,2,4

5 = 1, 5,

6 = 1,2,3,6

7 = 1, 7

Hence

1, is common to all number.

2, is common to two numbers

3, is common to two numbers

5 is common to one number

7 is common to one number.

Hence

1 x 2 x 3 x 5 x 7 = 210 the LCM.

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lenpollock

Lvl 16
9mo ago

What else can I help you with?