Replace the question mark with the correct number.

Solve this riddle by finding the odd one out from the rest.

The dirtier I get, the whiter I look. Who am I?

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 the sequence

1, 2, 6, 21, 88, __?

Can you count the number of triangles in the picture below?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Find the Goldfish below the given Image.

What do you see in the image below