What number do you get when you multiply all of the numbers on a telephone's number pad?

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

How can you make a TV, a bed, a dog, and a car liquid?

By using 'because' continuously three times, can you make an English statement ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

A guy in his thirties is found dead in a forest. The shocking thing about the body is that he is wearing his swimming trunks snorkel and a facemask.

For your information, the nearest lake is some 10 miles away and the sea is hundreds of miles away.

How did he die then?

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

Why do we preferably have round manhole covers and not square ones?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3