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Best Answer

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

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3mo ago
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Wiki User

12y ago

You can't find the LCM of a single number. The LCM of 3,4,5 and 6 is 60.

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Wiki User

13y ago

420

3 = 3*1

4 = 2*2

5 = 5*1

6 = 2*3

7 = 7*1

1*3*2*2*5*7 = 420

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Wiki User

11y ago

It is: 420

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Q: What is the LCM of 3 4 5 6 7?
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