How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

How many triangles can you count in the figure given?

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.