What has no start, end, or centre?

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

A man dies of old age on his 25 birthday. How is this possible?

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?