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.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you find the missing piece of the Porsche?

Why 1729 is a magic number? Answer Logically.

What does this rebus means ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What do the following words have in common?

Assess
Banana
Dresser
Grammar
Potato
Revive
Uneven
Voodoo

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Can you count the number of squares in the figure below?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?