They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

What goes through cities and fields, but never moves?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I cannot talk, but I always reply when spoken to. What am I?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

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

I am white when I am dirty, and black when I am clean. What am I?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

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