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

What begins with T, ends with T, and has T in it?

A shopkeeper allows people to buy a cold drink bottle in exchange for five empty bottles. A guy had a party at home and spent 77 cold drink bottles at the party. Now he has 77 empty bottles with him.

How many bottles do you think he can buy in exchange for those 77 empty bottles?

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

John decided to give his bike 3 coats of paint. Which coat would go on the first?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

The more you take me, the more you leave me behind.
Who Am I?