Prof. Giray Okten

Monday, February 23, 2009

Week 3 - Problem 5

Betty likes calculating the sum of the digits that she sees on her digital clock (for instance, if the clock shows 21:17, then Betty gets 11). What is the biggest sum she can get if the clock is a 24-hour clock?

A) 24 B) 36 C) 19 D) 25 E) another answer