What least number must be added to 1056, so that the sum is completely divisible by 23 ?

Question: What least number must be added to 1056, so that the sum is completely divisible by 23 ?
[A].

2

[B].

3

[C].

18

[D].

21

Answer: Option A

Explanation:

23) 1056 (45
92
—
136
115
—
21
—

Required number = (23 – 21)
= 2.