Q. Find the common factors of
(a) 8, 20 \: (b)\: 9, 15

Answers (1)

a)  8=2×2×2
     20=2×2×5
    common factor =2×2=4

b)  3×3=9,

    3×5=15
   3 is the common  factor of 9 and 15 

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