Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

How many times in a given day, minutes and hour clock comes in a straight line ?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

What runs around the whole yard without moving?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What can you hold in your right hand, but never in your left hand?

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?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Why do people go to bed?

Can you count the number of triangles inside a triangle?