What least number should be added to 1015, so that the sum is completely divisible by 25? Choose the correct choice.
A) 4  B) 3  C) 2  D) 10  E) 5

Rationale: "1015 ã · 25 = 40 with remainder = 15 15 + 10 = 25 . hence 10 should be added to 1015 so that the sum will be divisible by 25 answer : option d"
Answer: D