About This Lesson
The 13th in a series of videos where each week I visit my favorite mathematics websites. We return to the NRICH website to have a look at their annual offering of an advent calendar. But this is not your usual advent calendar because behind each door instead of a chocolate treat you will find… a mathematical treat! One lovely problem for each of the days leading up to Christmas. NRICH produces the goods once again. Ho, ho, ho!
