My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Can you find out which number multiplied by itself will give the output as 12345678987654321?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

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?

I always drive my customer away.

Who am I?

Can you count the number of triangles in the given figure?

I don't get anymore wetter, no matter how much rain falls on me.

What has one eye, but can’t see?

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.