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  1. H.C.F of 42, 63 and 140 is ?
    1. 14
    2. 9
    3. 21
    4. 7
Correct Option: D

H.C.F. of 42 and 63 is 21.
∵ H.C.F of 21 and 140 is 7

∴ H.C.F. of 42, 63 and 140 is 7


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