You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Count the number of lines in the image below ?

What English word has three consecutive double letters?

What is the centre of gravity?

You need to move three matchsticks to form three squares. Can you do it?

Can you count the number of triangles in the picture below?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

A king sentenced a man to the death sentence for some crime he had committed. Known for his kindness, the king told the culprit that he had a choice to die in a way he decides.

The culprit was clever and said something that saved him from death. What method do you think he must have chosen for his death?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?