We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Can you count the number of triangles in the given figure?

I’m tall when I’m young, and I’m short when I’m old. What am I?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

What can go up a chimney down, but can’t go down a chimney up?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?