In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not-rounded numerals equals 24.

What am I?

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

Can you solve this picture maths equation?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

When it's bad luck to meet a black cat?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

What word is pronounced the same if you take away four of its five letters?