Which Burger Is Different in below image?

The dirtier I get, the whiter I look. Who am I?

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

What is the Surname of Barbie Doll?

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

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

How many times can you subtract the number two from the number fifty?

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

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?