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?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

What has one letter and starts with an E?

Which Burger Is Different in below image?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

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?

If a wheel has 54 spokes, how many spaces are there between the spokes?

I’m tall when I’m young, and I’m short when I’m old. What am I?