There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

What occurs twice in a week, once in a year but never in a day?

When 99 is considered higher than 100?

What is the next number in the series?

15 29 56 108 208 ?