Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Which Burger Is Different in below image?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

What you cannot hold but it is yours?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?