What is common among 11, 69, and 88?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

How many sides does a circle have?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?