Count On
Explorer
Puzzle of the Day
These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.
On a digital clock there are times which have the special property that the minutes digits add up to the hours digit, like 7:25 or 13:49. Which hour has the most of these times?
Answer: Each hour from 5:00 to 10:00 has 6.