There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

How is the moon similar to a dollar?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

How many times can you subtract the number two from the number fifty?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

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?