Earlier (2015): HBD At The Far Right Tail Of The Bell Curve: Math Competition Winners MOSTLY Asian, And ALL Male

HBD Watch:  Results of the 2022 International Math Olympiad are out. Our team placed third in the overall rankings, behind China and South Korea.  You can see all the results here.  

Sex-wise, the M-F numbers for the ten top-scoring six-member teams were 6-0, 6-0, 6-0, 6-0, 6-0, 6-0, 6-0, 6-0, 6-0, and 5-1 (she‘s an Israeli). When, oh when, shall we vanquish toxic masculinity?

Here‘s the American team.

Five Asians and a white guy—(Luke Robitaille was homeschooled in Texas. Ram Goel is a South Asian name.)

Of the six problems they had to solve, only Problem 3 gave them much trouble. If you‘d like to tackle it yourself, here it is.

Problem 3.  Let k be a positive integer and let S be a finite set of odd prime numbers. Prove that there is at most one way (up to rotation and reflection) to place the elements of S around a circle such that the product of any two neighbours is of the form x² + x + k for some positive integer x.