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

Can you write down eight eights so that they add up to one thousand?

During which month do people sleep the least?

How can you take 2 from 5 and leave 4?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?