Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Replace the question mark in the picture below.

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What begins with T, ends with T, and has T in it?

Where do fish keep their money?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?