My solutions to a hugely enjoyable competition hosted by GSA Capital in the summer of 2017. The competition involved solving 15 self-contained problems covering a broad range of topics.
Results released afterwards showed that I managed correct solutions to 13 of the 15 problems; 1 solution was incorrect (still haven't got around to working out which one) and the final problem is one of the trickier problems on Project Euler which I left unanswered.