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?

Count the number of triangles in the below picture?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What does this simple rebus mean?

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

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Our product and our sum always give the same answer. Who are we?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H