Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

If Japan and Panama decided to merge into a single country, probably people will name it Japanama.

Can you think of two more such country's unions that could produce similar names like Japanama by overlapping their three letters?

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?

Once upon a time, there was a castle on a square island. The entire island was surrounded by a 14m wide trench. The Romans had wanted to invade the castle and had brought a few wooden planks along with them to facilitate themselves in crossing the moat. The planks were however found to be only 13m long.

The Romans still managed to cross the trench. How did they do it?

Imagine you are in a room with no windows or doors. How will you get out?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?