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i i “9781107673311apA_p745-754” — 2015/3/16 — 17:23 — page 745 — #1 i NRICH NRICH material Chapter 1 Reviewing linear equations 1. Temperature When do Fahrenheit and Centigrade coincide? A problem-solving activity involving linear equations. http://nrich.maths.org/5608 2. Good work if you can get it A problem-solving activity involving linear equations. http://nrich.maths.org/996 3. Pyramids A problem-solving activity involving linear equations. http://nrich.maths.org/488 4. Leonardo's Problem A problem-solving activity involving simultaneous linear equations. http://nrich.maths.org/1941 5. Fair shares? A problem-solving activity involving linear equations and some factorisation http://nrich.maths.org/708 6. Rudolff’s problem Simultaneous linear equations with integer solutions http://nrich.maths.org/278/solution The authors have chosen material from the NRICH site for you as further extension and learning material. NRICH is a team of qualified teachers who are also practitioners in RICH mathematical thinking. The NRICH Project began in 1996. Originally it was an online maths club for interested (and highly able) students, mainly of secondary age. It is now a project which caters for all abilities and ages, and provides considerable support to teachers. It provides FREE and interesting mathematical games, problems and articles. NRICH is based in both the University of Cambridge's Faculty of Education and the Centre for Mathematical Sciences. i i i