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

What jumps when it walks and sits when it stands?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

What has many teeth, but cannot bite?

How many times in a given day, minutes and hour clock comes in a straight line ?

Find the value of "?" in the ball picture Riddle below:

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

I add 5 to 9 and get 2. The answer is correct, so what am I?

Spot 5 differences in two Christmas tree below: