Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

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?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Can you solve the photo plexer logic ?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

When it is alive we sing, when it is dead we clap our hands. What is it?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

A sundial has the fewest moving parts of any timepiece. Which has the most?