If an earthquake is 1 point higher on the Richter Scale than another earthquake which is actually 10 times stronger, how much stronger would an earthquake be if it was just half a point higher on the Richter scale?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

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 complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

Can you make a fire with just a single stick?

When can we add 2 to 11 and get 1 as the correct answer?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

Give it food and it will live; give it water and it will die.

Two prisoners Jack and Jill are locked in a cell.
There is open window approx 40 feet above the ground of the cell.
They are never able to reach there.

Then they plan to escape by a tunnel and they start digging out.
After digging for more than 20 days, Jill comes with the different plan and they escaped.

what was the plan ?