What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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

Who can jump higher than a Mountain?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

Can you count the number of squares in the given picture?

Can you write down eight eights so that they add up to one thousand?

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 high do you have to count before you use the letter “a” in the English spelling of the whole number?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

What is full of holes but still holds water?