Problems on H.C.F and L.C.M - General Questions

Three bells toll at intervals of 12, 10, 2 minutes. If they toll together now, after how many minutes will they next toll together?

Find the L.C.M. of 11, 35 and 6.

What is the least number which, when divided by 4, 9, 18, leaves a remainder 1 in each case?

Find the greatest number that divides 269, 109, 141 leaving the same remainder in each case.

The H.C.F. of two numbers is 19 and their L.C.M. is 570. If one of the numbers is 95, what is the other?