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Yesterday, 22:42

What is the greatest common factor of 42, 126, and 210?

F. 2

G. 6

H. 14

J. 21

K. 42

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Answers (1)
  1. Yesterday, 23:03
    0
    Prime factors of 42: 2x7x3

    prime factors of 126: 2x3x3x7

    prime factors of 210: 7x3x5x2

    now we multiply all the factors that they all have in common: 2x3x7 which is 42. So the highest common factor is 42
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