P476 Teletext 476 Jan12 22:41:12 WITH TELETEXT ——————————————————————————————————————— GCSE REVISION Teletext has teamed up with Revision Rescue to help you prepare for GCSEs. Through January, we'll be giving you top tips from the experts on getting ready for the exams. Watch out for: Monday: Biology Tuesday: English Wednesday: Intermediate Maths next >> Thursday: Advanced Maths Friday: Physics Saturday: Chemistry ——————————————————————————————————1/8—— Revision Rescue books are published by Dodder & Stoughton, price £4.99. Available from all good bookshops Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:58:22 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS FRACTIONS AND PROBABILITY: Probability is often calculated using fractions. Make sure you can: Add and multiply simple fractions, subtract a fraction from 1 All the possible outcomes in probability should add up to 1. In any questions where fractions are used, always give the final answers in their lowest terms. ——————————————————————————————————2/8—— By Sheila Hunt and Philip Hooper WORLD OF WORK p495 Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:56:14 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS FRACTIONS AND PROBABILITY If you only have time to revise two number topics, make sure that direct proportion is one of them. 2.5 litres of a solution contain 550 grams of a substance. How many litres would contain 750g? Answer: 3.4 litres How many grams would be contained in 9.375 litres? Answer: 2062.5 litres Press reveal for answer ——————————————————————————————————3/8—— Next: inverse proportion >>> WORLD OF WORK p495 Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:56:03 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS INVERSE PROPORTION The cooking time for a joint of meat is inversely proportional to the temperature of the oven. If a chicken takes one hour 30 mink to cook at 180 degrees, how long would it take if the temperature were 200 degrees? Answer: one hour 21 minutes How long would it take if the temperature were 150 degrees? Answer: one hour 48 minutes Press reveal for answers ——————————————————————————————————4/8—— Rjvjsion Rescue books are published by Dodder & Stoughton, price £4.99. Available from all good bookshops Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:59:11 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS INVERSE PROPORTION Remember these keys to calculating proportion: Use X - Direct for direct proportion. Use MAD (ie Multiply and then Divide) for inverse proportion. More questions on next page >>> ——————————————————————————————————5/8—— Education index 470 WORLD OF WORK p495 Flashback LostTouch Serv Pals TV PlusP476 Teletext 476 Jan12 22:44:21 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS INVERSE PROPORTION Aunt Matilda left £57,600 to be shared between her three cats in the ratio of their ages. Fluff was seven, Whisky three and Tibby two. How much would each receive? Press reveal for answers Divjdj the total into 7 + 3 + 2 = 12 shares. One share is worth £57,600 divided by 12 = £4,800. Fluff gets 7 x £4,800 = £33,600; Whisky gets 3 x £48,000 = £14,400; Tibby gets 2 x £4,800 = £9,600. cont >>> ——————————————————————————————————6/8—— Careers advice 495 EDUCATION INDEX p470 Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:44:21 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS INVERSE PROPORTION Aunt Matilda left £57,600 to be shared between her three cats in the ratio of their ages. Fluff was seven, Whisky three and Tibby two. If the cats had been a year older at the time of the share out, how much would Whisky have gained? Press reveal for answer: £57,600 divided by 15 = £3,840. Whisky would get 4 x £3,840 = £15,360. Gain = £15,360 minus £14,400 = £960. ——————————————————————————————————7/8—— Next page: coming up next week >>> EDUCATION INDEX p470 Flashback LostTouch Setv Pals TV PlusP476 Teletext 476 Jan12 22:44:14 WITH TELETEXT ——————————————————————————————————————— GCSE INTERMEDIATE MATHS Next week Sheila Hunt and Philip Hooper will offer more advice on intermediate maths GCSE. This includes: percentages standard form more quizzes Revision Rescue books, published bz Hoddjr & Stoughton, are available from all good bookshops, price £4.99. ——————————————————————————————————8/8—— Sunday: send in your revision queries Write to: Revision, Teletext, PO Box 297, London SW6 1XT Flashback LostTouch Setv Pals TV Plus