I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

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

Before reading ahead, you must know the fact that only one of the people here is telling the truth.

A says that B is lying.
B says that C is lying.
C says both A and B are lying.

Can you find out who is speaking the truth?

A Detective reviewed the information they had on the case so far.

A lady named 'Caterina' was found shot and they already had a list of suspects - Ankit, Tarun, Harish, Manoj and Manish.
The killer is a fan of challenges him by leaving notes ad various places.
* The first was found in a toilet room.
* The second was found in an art room.
* The third was in a restroom.
* the fourth in an underwater room.
* The fifth at the no-smoking room.

All of the notes read the same thing, 'The clues are where you find the notes.' Yet, nothing was found at any place the notes were.
Detective the genius, immediately solved the case.
Who was the killer?

What does this say?

XLR8

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?

You need to move three matchsticks to form three squares. Can you do it?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What is the next number in this series?

4,12,84,3612....