Can you place six X (crosses) in below board without making three in a row in any way ?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

In a chess board, the queen piece can move horizontally, vertically and diagonally freely. The picture represents the same.Can you place 8 queens on the board in a manner that none of the queens can attack each other?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

The dirtier I get, the whiter I look. Who am I?

John was a very careless driver, so his owner Jacob gave him an offer that he will get an incentive of Rs.30 for every bottle box he delivered without breaking it and he will be charged Rs.90 for every bottle box he broke. Jacob gave John 100 bottles-box to deliver. After delivery, Jacob paid John Rs.2400. How many bottles-box did John break?

Find the next number in the sequence

5 12 24 36 ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you move 2 matchsticks to form four equal sized squares.