Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Why is a river so rich ?

Move four matchsticks to the below square to form three squares?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

Can you complete the sequence?

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