Can you find the key in the picture below?

Can you fill the blank with the correct number?

6 30 870 756030 _____

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?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Identify the 10 differences between the two given pictures.

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

What number divided by 4 is the same as that number minus 4?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?

I am the fastest animal but cannot climb the tree. What am I?