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

What goes up but never comes down?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Which is heavier: a ton of bricks or a ton of feathers?

There are two beautiful yet remote islands in the South Pacific. The Islanders born on one island always tell the truth, and the Islanders from the other island always lie.
You are on one of the islands and meet three Islanders. You ask the first which island they are from in the most appropriate Polynesian tongue, and he indicates that the other two Islanders are from the same island. You ask the second Islander the same question, and he also indicates that the other two Islanders are from the same island.
Can you guess what the third Islander will answer to the same question?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

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

Can you find out which number multiplied by itself will give the output as 12345678987654321?