Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

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

Can you place three balls such that the equation shown in the picture holds true?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

how come the second man dies?

Using eight eights and addition only, can you make 1000?

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?

Can you replace the question mark with the correct number in the below table sequence?