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

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

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

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

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

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)?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What has one letter and starts with an E?