Problems on H.C.F and L.C.M
Four bells begin to toll together respectively at the intervals of 8, 10, 12 and 16 seconds. After how many seconds will they toll together again?

240 seconds
246 seconds
242 seconds
243 seconds

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Problems on H.C.F and L.C.M
HCF of two numbers is 27 and sum of the two numbers is 216. How many such pairs of numbers are possible?

3
2
1
4

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Problems on H.C.F and L.C.M
Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is:

80
95
90
85

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