This is the heart of the book. It features a selection of problems primarily from the British Mathematical Olympiad (BMO) rounds 1 and 2.
(nk)=n!k!(n−k)!the 2 by 1 column matrix; n, k end-matrix; equals the fraction with numerator n exclamation mark and denominator k exclamation mark open paren n minus k close paren exclamation mark end-fraction 4. Synthetic Geometry mathematical olympiad primer pdf
The first half of the book covers the four pillars of Olympiad mathematics. This is the heart of the book
: Calculating arrangements where order matters ( ) or does not ( mathematical olympiad primer pdf