00:00 Intro 25 - 45/90 - 150 Take 15
00:30 Lessons from shooting the problem
01:15 First idea - Orders of magnitude
03:30 Second idea - Making the estimate
05:00 The helper for the estimate
06:05 Using the helper inequality
07:30 Divisibility idea before casework
09:30 The use of a little idea
10:00 Casework a = 3
14:50 Casework a = 2
22:25 Lessons from the problem
24:50 Thanks for problem solving :)
BOUNDING IN DIVISIBILITY | BOUNDING | DIVISIBILITY | CASEWORK
