When can we add 2 to 11 and get 1 as the correct answer?

What can go through glass without breaking it?

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?

Count the number of triangles in the given picture.

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

Take away the whole and some still remain. What is it?

How many times can you subtract the number 5 from 25?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?