Why Aeroplane windows are round?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

The answer I give is yes, but what I mean is no. What was the question?

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

What has hands, but can’t clap?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

You see me once in June, twice in November, and not at all in May. What am I?

There are forty elephants and they have forty-fore heads. How can this be possible?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

What runs around the whole yard without moving?