How can you write nineteen in a manner that if we take out one, it becomes twenty?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

With the help clues provided in the image, can you find the 5 digit key?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

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

I cannot talk, but I always reply when spoken to. What am I?

Spot the cat in the picture below

Next Number in the Series,

5, 16, 49, 104, ?