Replace the question mark with the correct number below.

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

Solve the equation in the image by looking at the pattern closely.

A clock loses 10 minutes each hour. If the clock is set correctly at noon, what time is it when it reads 3 PM?

Why Aeroplane windows are round?

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

Before Mount Everest was discovered, what was the highest mountain in the world?

what does the below rebus means?

What is the next number in this series?

4,12,84,3612....