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.

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

Count the number of triangles in the picture below:

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

Can you find the number?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

If 1+9+8=1, what is 2+8+9?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?