Wed 19 Jan, 2011 09:22 pm - Hey, lennyfan, I think you got the ratios of the triangle out of order. (Made the same mistake myself and just caught it.) A 30-60-90 triangle has a ratio of the sides of 1 : sqrt(3) : 2. So... (view)
Wed 30 Dec, 2009 06:13 pm - After an hour of calculation, I've submitted my answer. I found the area of the football in terms of the radius, then found the area of the center section in terms of the radius. I then took... (view)
Wed 30 Dec, 2009 06:03 pm - Yes, that provides a good starting point. If we can figure out the area of the football (like in #334), then the total area is 3 times the area of the football minus 2 times the area of the center... (view)
Wed 30 Dec, 2009 06:01 pm - Let's look at boundaries. The area of the shaded portion is 2010 square cm. So the area of the three circles together has to be more than that. So the minimum possible circle area is 2010 /... (view)
Wed 30 Dec, 2009 12:14 pm - So time to share the answer, now that it has been judged. Looks like we won't have to wait another week.
Like last year, they based the Lenny on the Advent Calendar. Last year, it was the... (view)
Wed 23 Sep, 2009 06:27 pm - Um, at least 2 errors in that calculation, anneska. And then the whole pizza issue means that buying all of them in the cheaper version doesn't necessarily give the lowest cost. (view)
