- British Mathematical Olympiad
The

**British Mathematical Olympiad**forms part of the selection process for the UKInternational Mathematics Olympiad team. There are two rounds, the BMO1 and the BMO2.**BMO Round 1**The first round of the BMO is held in December, and from 2006 is an open entry competition, costing £15 to enter. However, this fee is waived for those who(1) achieve the qualifying mark in the

Senior Mathematical Challenge **and**(2) have a British passport, or have studied for 3 years full time education in the UK.The paper lasts 3½ hours, and consists of six questions (from 2005), each worth 10 marks.Candidates are encouraged to write full proofs to the questions they attempt, as a full answer to a question is worth many more marks than incomplete answers to several questions. This is because of the marking scheme: an answer is marked on either a "0+" or a "10-" mark scheme, depending on whether the answer looks generally complete or not. So if an answer is judged incomplete or unfinished, it is awarded a few marks for progress and relevant observations, whereas if it is presented as complete and correct, marks are deducted for faults, poor reasoning, or unproven assumptions. As a result, it is quite uncommon for an answer to score a middling mark (e.g. 4–6).

Roughly 800 students sit the BMO1 paper each year, and many of these attain a very low score as a percentage of the total number of marks available—the

median score in 2004 was approximately 5 or 6 (out of 50). However, it should be noted that the paper is meant to be a way of selecting the best young mathematicians in the country, and is therefore very difficult. Generally only about 30–40 students will score more than 50% in BMO1, with perhaps only 1 or 2 scoring above 90%.From the results of BMO1, 100 students are chosen to be invited to sit BMO2—generally from amongst the top scorers, although younger students scoring slightly less than their older counterparts are often chosen also. BMO2, unlike BMO1, is strictly invitational. It has been indicated that this will change for 2006-7, however. [https://nrich.maths.org/discus/messages/27/114822.html?1165407226]

**BMO Round 2**BMO2 is normally held in early February, and is significantly more difficult than BMO1. BMO2 also lasts 3½ hours, but consists of only four questions, each worth 10 marks. Like the BMO1 paper, it is not designed to test knowledge of advanced mathematics, but rather the candidate's ability to apply basic ideas to unusual problems.

Half of the candidates score less than 10, and it is rare for someone to score more than 35.

Twenty of the top scorers from BMO2 are subsequently invited to the training camp at

Trinity College, Cambridge for the first stage of the IMO UK team selection.**External links*** [

*http://www.bmoc.maths.org/home/bmo.shtml British Mathematical Olympiad Committee site*]

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