Can you replace the question mark with the correct number?

What English word has three consecutive double letters?

You are stuck on an island where you have nothing. You find four pieces of paper somewhere on the island. What will be your strategy to escape from the island safely?

PS: No other resource is available to you on the island, neither can you build anything.

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

Complete the table series riddle by finding the number that can replace "??".

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

How can you leave a room with two legs and return with six legs?

What you cannot hold but it is yours?

O_er_t_o_

Complete the missing letters of the given word.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?