Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

What is red and smells like blue paint?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?