The least number which should be added to 2497 so that the sum is exactly divisible by 5, 6, 4 and 3 is:
L.C.M. of 5, 6, 4 and 3 = 60.
On dividing 2497 by 60, the remainder is 37.
$\therefore$ Number to be added = $\left(60 - 37\right)$ = 23.
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