Decode this picture on T-Shirt and tell what it says ?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?

Rihana, Peeta, and Logan order a pizza for $10. Out of the three, Rihana and Peeta were quite hungry and ate 6 slices a piece, while Logan had just 2 slices.

Now, they want to split the cost among them fairly but due to the lack of change, they decide to round off the cost to the nearest possible dollar.

Can you find out the fairway which should be used to split the money?

What if the pizza was worth $11?

Find out the number of circles in the given picture having Illusion

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?

Decode below rebus
D
N
A
T
S , D

Can you convert the number zero(0) into a positive number using just one mathematical operator ?