Replace the question mark with the number below given a simple math problem.

Considering the below equation:

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

Then, I + II + III = ?

What is the longest word in the dictionary?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

When monkey rotate the gear, which mark will be hit 1 or 2 ?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

I am white when I am dirty, and black when I am clean. What am I?

How is a fly different from a mosquito?