A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

They are three errirs in this question. Can you find them?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

What is the centre of gravity?

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.

Before Mount Everest was discovered, what was the highest mountain in the world?

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

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

I know a nine-letter word having only one vowel.
Do you ?