Find out the missing number in the picture attached:

What is the Surname of Barbie Doll?

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?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

No one wants to have it, but if one got it, he does not want to lose it. What is It?

Why is it very easy to weigh a fish?

What is the word or phrase below?
R | E | A | D

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?