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

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Which Burger Is Different in below image?

How many times can you subtract the number 5 from 25?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

I look flat, but I am deep. Hidden realms I shelter. Lives I take, but the food I offer. At times I am beautiful. I can be calm, angry, and turbulent. I have no heart but offer pleasure as well as death. No man can own me, yet I encompass what all men must have. What am I?

What is the Surname of Barbie Doll?

How many letters are in the alphabet?