Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

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?

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

Look at the picture and find out which square is not linked with any of the other squares.

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

Why do we preferably have round manhole covers and not square ones?

What has a ring but no finger?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?