What is so fragile that saying its name breaks it?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

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

Can it be possible to build a house that has all its four walls facing towards the South?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

In the four images below, can you find the odd one out?