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

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

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 can you hold in your right hand, but never in your left hand?

What is the last thing you take off before bed?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

Prove that the below maths equation is true.

8 + 8 = 91