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.

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Find the last number in the series below:

voN luJ yaM raM ---

What number do you get when you multiply all of the numbers on a telephone's number pad?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What has many teeth, but cannot bite?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

What has no start, end, or centre?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

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?