T-shirt History Beginning with the 15th annual contest in 2001, Westmont has given complimentary T-shirts to participating students and teachers. Following is a depiction of the designs used each year. The designs are meant to connect with the number of years the contest has run.
 2001—15th Annual Contest A combinatorial identity. 2002—16th Annual Contest A hypercube with its 16 vertices. 2003—17th Annual Contest Gauss’ construction of a regular 17-gong. 2004—18th Annual Contest A Celtic knot with 18 crossings. 2005—19th Annual Contest Front: a design illustrating that 19 is a hexagonal number. 2005—19th Annual Contest Back: a formula for Hn, the nth hexagonal number, with H2 = 19. 2006—20th Annual Contest Front: a net for an icosahedron. 2006—20th Annual Contest Back: an icosahedron and a formula for its volume. 2008—21st Annual Contest Binet’s formula for Fibonacci numbers gives F8 = 21. 2009—22nd Annual Contest Maximum number of pieces when cutting a pizza 6 times = 22. 2010—23rd Annual Contest Relation between 23, e, and π; a skeletal proof showing why πe < eπ. 2011—24th Annual Contest A Cayley graph depicting α and β as generators of S4, which has 24 elements. 2012—25th Annual Contest Prime factorization reveals that only perfect squares have an odd number of factors. 2013—26th Annual Contest Front: a net for a rhombicuboctahedron. 2013—26th Annual Contest Back: a rhombicuboctahedron with its 26 faces.   Here is a video demo that creates a rhombicuboctahedron from its net. 2014—27th Annual Contest A cube (volume = 27) progresses towards a Menger sponge (fractal dimension ≈ 2.7). 2016—28th Annual Contest Euclid’s Proposition IX.36, with n=3, implies that 28 is a perfect number. For a detailed explanation of the T-shirt, click here. 2017—29th Annual Contest Maximum number of pieces when cutting a pizza 7 times = 29. For a detailed explanation of the T-shirt, click here.