How is the moon similar to a dollar?

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?

How many triangles are there on the puzzle below?

What is the fastest way to double your money?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

In the picture given below, can you find out which digit will take place of the question mark?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

I taste better than I can smell. Who am I?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

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