How can you tell a raw egg from a hard-boiled egg?

What makes this number unique: 8,549,176,320?

What is the next number in this series?

4,12,84,3612....

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Where do you go to learn how to make ice cream?

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?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

What type of tree can I carry in my hand?