Problems on H.C.F and L.C.M
Six bells commence tolling together and toll at the intervals of 2,4,6,8,10,12 seconds resp. In 60 minutes how many times they will toll together.

21
17
31
24

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Problems on H.C.F and L.C.M
Find the L.C.M. of 16, 24, 36 and 54.

228
432
189
321

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