what's the probability of getting a king or a queen from a pack of 52 cards?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What goes through cities and fields, but never moves?

It spends most of its day eating white, but when it’s quick enough, it gets to eat fruit and sometimes some blue things. It’s in a dark room, where the walls are blue, it runs from a ghost that roams the halls and haunts it all the time. What is it?

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