The sum of numbers between 100 and 500, which are divisible by 6, is:
20100
Numbers divisible by 6 between 100 and 500
Sn = 102 + 108 + 114 + .......+ 498.
If there are n terms in sn, then
498 = 102 + (n - 1). 6 ⇒ n = 67.
∴ Sn = 12 (67)(102 + 498) = 20100.