Cambridge IGCSE Mathematics - International 0607 — 2015 Oct/Nov Paper 2 · Variant 1

This document consists of 8 printed pages. DC (ST/SW) 103723/1 © UCLES 2015 [Turn over Cambridge International Examinations Cambridge International General Certificate of Secondary Education * 7 7 3 9 3 6 5 2 3 4 * CAMBRIDGE INTERNATIONAL MATHEMATICS 0607/21 Paper 2 (Extended) October/November 2015 45 minutes Candidates answer on the Question Paper. Additional Materials: Geometrical Instruments READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. Do not use staples, paper clips, glue or correction fluid. You may use an HB pencil for any diagrams or graphs. DO NOT WRITE IN ANY BARCODES. Answer all the questions. CALCULATORS MUST NOT BE USED IN THIS PAPER. All answers should be given in their simplest form. You must show all the relevant working to gain full marks and you will be given marks for correct methods even if your answer is incorrect. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 40.

2 0607/21/O/N/15 © UCLES 2015 Formula List For the equation ax bx c 0 2 + + = x a b b ac 2 4 2 ! = - - Curved surface area, A, of cylinder of radius r, height h. r A rh 2 = Curved surface area, A, of cone of radius r, sloping edge l. r A rl = Curved surface area, A, of sphere of radius r. r A r 4 2 = Volume, V, of pyramid, base area A, height h. V Ah 3 1 = Volume, V, of cylinder of radius r, height h. r V r h 2 = Volume, V, of cone of radius r, height h. r V r h 3 1 2 = Volume, V, of sphere of radius r. r V r 3 4 3 = sin sin sin A a B b C c = = cos a b c bc A 2 2 2 2 = + - sin bc A 2 1 Area = A C B c b a

3 0607/21/O/N/15 © UCLES 2015 [Turn over Answer all the questions. 1 Work out 12 7 1 3 - . Give your answer in its lowest terms. Answer … [2] 2 Change 12 metres per second into kilometres per hour. Answer … km/h [2] 3 (a) Write 0.000048 in standard form. Answer(a) … [1] (b) Work out 2 10 6 10 8 7 # # # ^ ^ h h, giving your answer in standard form. Answer(b) … [2] 4 The price of a computer is reduced by 5%. The actual reduction is $17. Find the original price of the computer. Answer $ … [2]

4 0607/21/O/N/15 © UCLES 2015 5 Simplify 75 27 - . Answer … [2] 6 v u at = + (a) Find the value of v when u 12 = , a 2 =- and t 5 = . Answer(a) … [1] (b) Rearrange the formula to make a the subject. Answer(b) a = … [2] 7 17 cm 15 cm NOT TO SCALE A B C Work out the length of AC. Answer … cm [3]

5 0607/21/O/N/15 © UCLES 2015 [Turn over 8 0 0 10 Cumulative frequency Journey time (minutes) 20 30 20 40 60 80 100 120 140 160 180 200 The cumulative frequency curve shows information about the journey times to school of 200 students. (a) Find the median. Answer(a) … min [1] (b) Find the number of students with a journey time of more than 20 minutes. Answer(b) … [2] 9 Find the value of each of the following. (a) .0 2 3 ^ h Answer(a) … [1] (b) 2 1 1 - e o Answer(b) … [1] (c) 643 2 Answer(c) … [1] (d) log 3 9 Answer(d) … [1]

6 0607/21/O/N/15 © UCLES 2015 10 NOT TO SCALE 100° y° x° A B C D O A, B, C and D lie on a circle, centre O. Find the value of x and the value of y. Answer x = … y = … [2] 11 NOT TO SCALE –4 2 y x O The diagram shows the graph of y px q = + . Find the value of p and the value of q. Answer p = … q = … [3]

7 0607/21/O/N/15 © UCLES 2015 [Turn over 12 8 7 4 P Q 5 U The Venn diagram shows the number of elements in each subset. (a) Find n P Q , l ^ h . Answer(a) … [1] (b) Shade the region P Q + l. [1] 13 A is the point ,4 4 - ^ h and B is the point ,4 10 ^ h. Find the equation of the perpendicular bisector of AB. Answer … [4] Questions 14 and 15 are printed on the next page.

8 0607/21/O/N/15 © UCLES 2015 Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at www.cie.org.uk after the live examination series. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. 14 y varies inversely as x. When x = 9, y = 3. (a) Find y in terms of x. Answer(a) y = … [2] (b) Find the value of y when x = 81. Answer(b) … [1] 15 The graph of ( ) cos y a bx = c has a maximum point at (360, 3) and a minimum point at (450, –3). Find the value of a and the value of b. Answer a = … b = … [2]

® IGCSE is the registered trademark of Cambridge International Examinations. CAMBRIDGE INTERNATIONAL EXAMINATIONS Cambridge International General Certificate of Secondary Education MARK SCHEME for the October/November 2015 series 0607 CAMBRIDGE INTERNATIONAL MATHEMATICS 0607/21 Paper 2 (Extended), maximum raw mark 40 This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers. Mark schemes should be read in conjunction with the question paper and the Principal Examiner Report for Teachers. Cambridge will not enter into discussions about these mark schemes. Cambridge is publishing the mark schemes for the October/November 2015 series for most Cambridge IGCSE®, Cambridge International A and AS Level components and some Cambridge O Level components.

Page 2 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2015 0607 21 © Cambridge International Examinations 2015 Abbreviations cao correct answer only dep dependent FT follow through after error isw ignore subsequent working oe or equivalent SC Special Case nfww not from wrong working soi seen or implied Question Answer Mark Part Marks 1 1 4 2 M1 for 7 4 12 12 − oe or better e.g. 3 12 2 43.2 2 M1 for 12 × 60 × 60 ÷ 1000 oe 3 (a) (b) 4.8 × 10 – 5 1.2 × 10 16 1 2 B1 for correct non standard form answer 4 340 2 M1 for 17 ÷ 0.05 oe 5 3 2 2 B1 for 3 5 or 3 3 or M1 for 3 9 3 25 × − × 6 (a) (b) 2 t u v − oe 1 2 M1 for correctly isolating the term in a M1 for correct division by t 7 8 3 M2 for 2 2 15 17 − or better or M1 for AC2 + 152 = 172 oe or better 8 (a) (b) 13 36 1 2 M1 for 164 seen or indicated 9 (a) (b) (c) (d) 0.008 or 125 1 oe 2 16 2 1 or 0.5 1 1 1 1 10 [x =] 50 [y =] 130 1 1FT 180 – their x

Page 3 Mark Scheme Syllabus Paper Cambridge IGCSE – October/November 2015 0607 21 © Cambridge International Examinations 2015 Question Answer Mark Part Marks 11 [p =] 2 1 or 0.5 [q =] 2 2 1 M1 for gradient = 4 2 oe 12 (a) (b) 4 1 1 13 4 7 oe 3 = − + y x 4 B1 for midpoint (0, 7) M1 for gradient of AB = 4 4 4 10 − − − or better M1 for gradient = 1 gradient of − AB 14 (a) (b) [y =] x 9 1 2 1FT M1 for x k oe Only FT incorrect k 15 [a =] 3 [b =] 2 1 1 Allow 2k, k integer ≠0