SSC CHSL 10 Jan 2017 Shift 3 Paper

L.C.M. of 15 and 35 = 105
Now, the greatest 4 digit number = 9999
By dividing 9999 with 105, ⇒ 9999 = 105 × 95 + 24
Quotient = 95 and remainder = 2
Thus, the greatest 4 digit number that can be divided by 105(15 and 35) = 9999 - 24 = 9975