Solution to 2: Prime Game
As the title of the puzzle suggests, this puzzle involves prime numbers.
The text, as its first sentence tells you, does hide a secret message. To find it, each word of the text must be indexed starting from 1. Then, keep only the words that are corresponding to a prime number index. You may now notice that there are same number of words as the given numbers.
Index each word with the given number, skipping the words corresponding to "X" and you will get the answer "EBONY"
EBONY