A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Replace the question mark with the correct number.

What goes up but never comes down?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Why is 6 afraid of 7?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

10+10 and 11+11 can give you the same answer.

Explain how?

Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (for example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (for example, 4 and 2 can be combined to form 4/2 or 2/4)

Question: how can we do this?