Prove that the below maths equation is true.

8 + 8 = 91

Keyboard words are not in alphabetical order, Why?

If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

Remove two matchsticks to make the below equation correct.

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

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

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?