What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

What is always in front of you but can’t be seen?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

Which is the smallest number that you can write using all the vowels exactly once?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

Can you count the number of triangles inside a triangle?

Can you name some countries which do not have the alphabet 'A' in them?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

If eleven plus two equals one, what does nine plus five equal?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145