How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Buy me, smell me or deliver me, I do not change.

Who am I?

Which five letter word can be added at the end of below word to form a
valid word?

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How many words can a pen with half refill write?

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.

Sherlock breaks into a crime scene. The victim is the owner who is slumped dead on a chair and have a bullet hole in his head. A gun lies on the floor and a cassette recorder is found on the table. On pressing the play button, Sherlock hears the message 'I have committed sins in my life and now I offer my soul to the great Lord' and followed a gunshot Sherlock smiles and informed the police that's its a murder.

Why did he think so?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?