By Derek Holton

ISBN-10: 9814273872

ISBN-13: 9789814273879

The foreign Mathematical Olympiad (IMO) is an annual foreign arithmetic pageant held for pre-collegiate scholars. it's also the oldest of the overseas technological know-how olympiads, and pageant for areas is very fierce. This e-book is an amalgamation of the 1st eight of 15 booklets initially produced to lead scholars meaning to contend for placement on their country's IMO crew. the fabric contained during this booklet offers an advent to the most mathematical themes coated within the IMO, that are: Combinatorics, Geometry and quantity thought. additionally, there's a certain emphasis on tips to technique unseen questions in arithmetic, and version the writing of proofs. complete solutions are given to all questions. even though a primary Step to Mathematical Olympiad difficulties is written from the viewpoint of a mathematician, it's written in a manner that makes it simply understandable to children. This publication is usually a must-read for coaches and teachers of mathematical competitions.

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**Extra resources for A First Step to Mathematical Olympiad Problems**

**Example text**

Let's get some insight into things by trying for 10 instead. Well I can do it with one consecutive number. Clearly 10 adds up to 10! But I doubt that's what the question is all about. In fact, because it says “numbers” I think it really rules out one consecutive number. So we'll work on two or more numbers. Can we get 10 with two consecutive numbers? Can a + (a + 1) = 10? That would mean that 2a + 1 = 10. Hence 2a = 9, so a = 9/2. But a was supposed to be a whole number, so it can't be a fraction.

Look at the steps (a) to (i) and see which of them we went through in the last section with the 3 and 5 litre jugs. 4. Rethinking Drinking How did you go with your 35 litre glug? Apart from the drinking, there's the question of the unnecessary energy expended. 1=2 x 3 - 1 x 5. Looking at this equation we can interpret it as “fill the 3 litre jug two times and throw away one lot of 5 litres”. “fill” because 2 is positive and “throw away” because —1 is negative. So 7 = 14 x 3 — 7 x 5. This means we have to fill the 3 litre jug 14 times and throw away 7 lots of 5 litres!

Try the earlier questions. When you feel more confident with the various techniques, go on to the later questions. 4. 4 and so on). Good luck. 2. What is Combinatorics? A good question. Well if you look in a dictionary you'll see it's…OK so maybe my pocket dictionary is a little small. And maybe too if your dictionary at home is a few years old you may not be able to find “combinatorics” there either. Now of course it may just be that combinatorics is one of those words that isn't fit for polite society.

### A First Step to Mathematical Olympiad Problems by Derek Holton

by Jeff

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