What is the least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3?

L.C.M. of 5, 6, 4 and 3 = 60.

On dividing 2497 by 60, the remainder is 37.

∴ L.C.M. of 5, 6, 4 and 3 = 60. Number to be added = (60 - 37) = 23.