Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

What is the next number in the series?

15 29 56 108 208 ?

Can you solve the below tricky visual equation?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

What has to be broken before you can use it?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

What demands an answer, but asks no questions

What number when divided in half becomes zero?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?