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hcf

the highest factor two numbers have in common

eg, 18, 21

18 = 1x8 4x                           21 = 1x21

         2x9 5x                                 2x

         3x6                                     3x7

    ans= 1, 2, 3, 6, 9, 18         ans= 1, 21, 3, 7 

 so overall answer = 3

1 of 2

LCM

2 of 2

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laura ward

first comment yay

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