4/9, 10/21 an 20/63?​
A. 4/189
B. 6/63
C. 2/63
D. 20/21

1 thought on “4/9, 10/21 an 20/63?​<br />A. 4/189<br />B. 6/63<br />C. 2/63<br />D. 20/21”

1. Step-by-step explanation:

   H.C.F of 4/9, 10/21 and 20/63 = H.C.F of 4,10 and 20 / L.C.M of 9,21 and 63

   = H.C.F of 4, 10 and 20 = 2 &

   L.C.M. of 9, 21 and 63 = 63.

   Required H.C.F. = 2/63

   So C is a correct option 2/63

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