A father's child, a mother's child, yet no one's son.

Who am I?

What occurs twice in a week, once in a year but never in a day?

When it's bad luck to meet a black cat?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

What is the next number in this matchsticks series riddle?

Which is the rope you never skip with?

You can see three almost identical images below. Can you spot the odd one out from them?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?