Mark Joshi, our friend and colleague, sadly died in October of 2017 but his short guide "On becoming a Quant" has consistently been one of the most popular articles here at MoneyScience. After the success of the article below - he went on to collaborate with Nicholas Denson and Andrew Downes to produce a book, "Quant Job Interview Questions and Answers" which you can find on Amazon.com and Amazon.co.uk.