What is the H.C.F. of 4/9, 10/21 and 20/63? – McqOptions

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1.	What is the H.C.F. of 4/9, 10/21 and 20/63?
A.	4/189
B.	2/63
C.	6/63
D.	None of these
Answer» C. 6/63

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