The H.C.F of 9/10, 12/25,18/35 and 21/40 is
1) 3/5 2) 252/5 3)3/2800
4)63/700 5) none of these
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None of these
Step-by-step explanation:
HCF of
9 is 3x3
12 is 3x2x2
18 is 3x3x2
21is 3x7
highest common factor is 3
LCM
40,35,10,25 is 1400
3/1400
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