Why is it very easy to weigh a fish?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

By moving just one matchstick, you need to make the below statement true. Can you do it?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Why despite killing dozens of people Charley and Wilma were not punished?

What have one eye but still cannot see?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211