fill in the blank 19=8, 6=3, 70=7, 8=5, 4=4, 60=5, 15=7, 16=? 17=?

Answer 1

16 = 7 and 17 = 9 because the number of letters in the spelling sixteen is 7 and those of seventeen is 9.

Answer 2

TYSM IVE BEEN LOOKING FOR THAT ANSWER FOR FOREVER

Answer 3

If you like this kind of initially confusing puzzle, try this oldie but goodie.
1
11
21
1211
111221
312211
what comes next?