It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

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

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

Name a key which is hardest to turn.

If it took eight men ten hours to build a wall, how long would it take four men to build it?

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

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?