What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

Replace the question mark with the correct number in below Picture:

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

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

What word is represented by this rebus?