Count the number of triangles in the picture below:

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

By moving just one matchstick, you need to make the below statement true. Can you do it?

How do you go from 98 to 720 using just one letter?

Can you count the number of children in the picture below

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

What time is it when an elephant sits on a fence?

When is the top of a mountain similar to a savings account?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What breaks yet never falls, and what falls yet never breaks?