Which Burger Is Different in below image?

I have an eye but still cannot see.

Who am I?

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?

Before Mount Everest was discovered, what was the highest mountain in the world?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Which is the correct shadow of the bird?

O_er_t_o_

Complete the missing letters of the given word.

Three ants are going up a hill, one behind the other. The last ant then says to the other ants, 'There is an ant behind me!'' How come?

What jumps when it walks and sits when it stands?

I am the fastest animal but cannot climb the tree. What am I?