Considering the below equation:

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

Then, I + II + III = ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

What does this rebus riddle mean?

The more it dries, the wetter it becomes. Can you tell what it is?

What does this simple rebus mean?

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

Who has married many women but was never married?

Take away the whole and some still remain. What is it?

I am quite hot but become too cold if you remove the first two letters. What am I?

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?