Find the number which is nearest to 3105 and is exactly divisible by 21.
Choose the correct choice from the following answers:  A) 1208  B) 3108  C) 241  D) 217  E) 3147

Rationale: "sol . on dividing 3105 by 21 , we get 18 as remainder . number to be added to 3105 = ( 21 - 18 ) - 3 . hence , required number = 3105 + 3 = 3108 . option b"
Answer: B