Here is the video I created going through all 15 problems on the UBC Math Challengers 2017 Provincial Co-op section. Learn and enjoy!
Timestamps:
Problem 1: 00:15 Problem 2: 02:43 Problem 3: 04:20 Problem 4: 06:14 Problem 5: 08:44 Problem 6: 12:32 Problem 6 discussion on proof by contradiction: 15:27 Problem 7: 19:46 Problem 8 method 1: 27:59 Problem 8 method 2: 30:45 Problem 9: 37:24 Problem 10: 38:25 Problem 11: 42:53 Problem 12: 46:25 Problem 13: 52:40 Problem 14: 58:13 Problem 15: 1:01:58
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