When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

What does this Rebus Picture means ?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Find the missing number in the image below.

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

There were three women in all the swimming costumes!
One was happy and the other two were sad!
The happy one was crying and the sad ones were smiling.
Why was this?

We are a group of eight brothers. We consider the weak, yet we protect the king in every battle. If we move ahead, we never turn back. Who are we?

What is full of holes but still holds water?