I start with 100. Every hour, I lose half of what I currently have. How many hours pass before I have exactly 6.25 left?
4
After 1 hour: 50. After 2 hours: 25. After 3 hours: 12.5. After 4 hours: 6.25.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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