Can you find a number that lies one third of the distance between 1/3 and 2/3?

Name a key which is hardest to turn.

Can you decipher the two rows to find the hidden word?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

During which month do people sleep the least?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

Why are all black people so quick ?

This one is a popular quiz/puzzle. Can you find out the names of the websites depicted using the emojis in this picture?