Count On


Puzzle of the Day

These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.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.

Puzzle Archive