The centre of the third figure is empty. What digit should fit inside?

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

How can you drop a raw egg from a height onto a concrete floor without cracking it?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

Can you write down eight eights so that they add up to one thousand?

Where do you go to learn how to make ice cream?

What goes through cities and fields, but never moves?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What is the fastest way to double your money?