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

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

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What does the below rebus riddle means?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

Can you place three balls such that the equation shown in the picture holds true?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

What jumps when it walks and sits when it stands?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Can you identify if it's a murder or a suicide ?