O_er_t_o_

Complete the missing letters of the given word.

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?

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 ?

What breaks yet never falls, and what falls yet never breaks?

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

If six children and two dogs were under an umbrella, how come none of them got wet?

I make two people out of one. What am I?

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?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?