Answer: 31-40 6 bracelets, 41-50 4 bracelets, 51-60 4 bracelets, 61-70 4 bracelets, 71-80 5 bracelets, 81-90 7 bracelets
Explanation:
6 given numbers within 31-40
4 given numbers within 41-50
4 given numbers within 51-60
4 given numbers within 61-70
5 given numbers within 71-80
7 given numbers within 81-90