Featured Riddle of the Day
How many times a day do the hands of a clock overlap?
22 times (every 65.5 minutes except at 12 o'clock when they're already aligned)
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The Burning Rope Problem
You have two identical ropes that burn irregularly. Each rope takes exactly 60 minutes to burn completely. How can you measure 45 minutes?
Light both ends of one rope and one end of the second rope. When the first rope is completely burned (30 minutes), light the other end of the second rope. When the second rope is completely burned, 45 minutes will have passed.
The Snake in the Box
What gets bigger the more you take away?
A hole
The Sword in the Stone
I am not alive, but I grow; I don’t have lungs, but I need air; I don’t have a mouth, but water kills me. What am I?
Fire
The Philosophical Puzzle
What can travel around the world while staying in a corner?
A stamp
Mathematical Pets
If you have me, you want to share me. If you share me, you haven’t got me. What am I?
A secret
The Meeting Time
Two trains started simultaneously from stations A and B and proceeded towards each other. They met at a place 120 km away from station A. After meeting, they took 9 hours and 16 hours respectively to reach their destinations. What is the distance between stations A and B?
400 km
The Valley Problem
What belongs to you but others use it more than you do?
Your name
The Burning Question
What can burn the eyes without touching them?
The sun
The Round Problem
What has to be broken before you can use it?
An egg