Problems on H.C.F and L.C.M
Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ?

16
15
10
4

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Problems on H.C.F and L.C.M
Find the H.C.F. of 513, 1134 and 1215.

63
58
42
27

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Problems on H.C.F and L.C.M
Express 1168/1095 in simple form?

16/15
19/18
18/17
17/16

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