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.

What does this rebus riddle mean?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Can you place three balls such that the equation shown in the picture holds true?

Which flower has two lips?

They are three errirs in this question. Can you find them?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Which letter of the alphabet has the most water?

While preparing the table for dinner, wife came up with an idea to tease his mathematician husband. She asked her husband to pick nine toothpicks and make ten without breaking any toothpick.

The husband was also smart and did it within seconds. How ?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?