9 friends decided to divide the hotel bill evenly. If the bill was $124.15 dollars, how much money did they pay if 1 cent is the smallest unit?
Choose the correct choice from the following answers.
A) $ 124.11  B) $ 124.12  C) $ 124.13  D) $ 124.14  E) $ 124.15

Rationale: this is equivalent to finding the first number that is divisible by 9 that occurs after 12415 . in order to divide the sum in 9 parts , the amount must be divisible by 9 divisibility rule of 9 : the sum of the digits must be divisible by 9 sum of digits of 12415 = 13 and 9 is divisible by 9 . hence , we need to remove 4 to this number for it to be divisible by 9 correct option : a
Answer: A