It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Can you name an animal whose killing cannot be performed without spilling your own blood?

What question can you never answer yes to?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.