Name a key which is hardest to turn.

When 99 is considered higher than 100?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Can you name four days which start with the letter 'T'?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Why do we preferably have round manhole covers and not square ones?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.