Puzzle Raffle Part 1

17	(13)
25	(7)
10100	(2)
4	(5)
10	(3)
111	(1)
1F	(19)

Hint 0: K is included... but not as 11.
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Hints might be added below if needed
A general hint for this chain: Each of the three puzzles are based around the same concept, so if you get this one you're on track for the rest -- this first puzzle is meant to be a simple (... relatively) introduction to the concept. There is math involved.
Hint 1: The characters are in order.
Hint 2: If #6 is throwing you off you might be on the right track! Google is your friend.
Hint 3: There are both letters and numbers in this URL.
BIG(?) Hint 4: If you're stuck with a 20: Think about how hexadecimal works, then broaden the concept. G comes after F.