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.

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

Which letter of the alphabet has the most water?

what does the below rebus means?

You see me once in June, twice in November, and not at all in May. What am I?

What is black when you buy it, red when you use it, and gray when you throw it away?

If a zookeeper had 100 pairs of animals in her zoo, and two pairs of babies are born for each one of the original animals, then (sadly) 23 animals don’t survive, how many animals do you have left in total?

Count the number of lines in the image below ?

What is the difference between a jeweller and a jailer?

Different lights make me strange by changing me into different sizes. What am I?