Question

The number from 1 to 33 are written side by side as follows: 123,456 $\dots$ 33. What is the remainder when this number is divided by 9?

• A. 1
• B. 3
• C. 6

Answer 1

The correct option is B 3

If the sum of digits is divisible by 9, then the number will also be divisible by 9.
Therefore, the sum of 1 to $33=\frac{33\times 34}{2}=561$
Now, the remainder, when 561 is divided by 9 = 3