Download [PDF] October 2018 CAIE P1 Questions 1112 Mathematics Cambridge Lower Secondary Checkpoint

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This document consists of 16 printed pages. IB18 10_1112_01/4RP © UCLES 2018 [Turn over   Cambridge International Examinations Cambridge Secondary 1 Checkpoint MATHEMATICS 1112/01 Paper 1 October 2018 1 hour Candidates answer on the Question Paper. Additional Materials: Geometrical instruments Tracing paper (optional) 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. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. NO CALCULATOR ALLOWED. You should show all your working in the booklet. 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 50.

2 © UCLES 2018 1112/01/O/N/18 1 Work out 53 ÷ 7 Give your answer correct to two decimal places. [2] 2 Tick () a box to show whether the answer to each of these calculations is less than 30, equal to 30 or more than 30 Less than 30 Equal to 30 More than 30 10% of 280 25% of 140 5 1 of 150 80% of 40 [2] 3 Write a number in each box to make a true statement. 6 – (–2) = 32 ÷ (–8) = × (– 4) × 3 = 24 [2]

3 © UCLES 2018 1112/01/O/N/18 [Turn over 4 Yuri is 1.6 m tall and Lily is 140 cm tall. Write down the ratio of Yuri’s height to Lily’s height. Give your answer in its simplest form. [2] 5 The diagram shows 5 angles. 57° a° b° c° d °NOT TO SCALE PQ R S T PS and RT are straight lines. Draw a ring around an angle that must be equal to 123°. a b c d Tick () the reason that best explains your answer. Vertically opposite angles are equal Angles on a straight line add up to 180° Angles around a point add up to 360° [1]

4 © UCLES 2018 1112/01/O/N/18 6 (a) Draw a ring around the best estimate of 83 8.7 9.1 9.5 41.5 [1] (b) Draw a ring around the value of 7 0 7 1 0 1 7 [1] 7 Work out. (a) 3.8 + 4 × 2.5 [1] (b) 37 × 45 + 63 × 45 [1] 8 Here is a number statement. 3 1 28 4 3   of y Find the value of y. y = [2]

5 © UCLES 2018 1112/01/O/N/18 [Turn over 9 The diagram shows a shape with rotational symmetry of order 2 70 cm 1.3 m 20 cm 50 cm NOT TO SCALE Work out the perimeter of the shape. Give your answer in centimetres. cm [3]

6 © UCLES 2018 1112/01/O/N/18 10 These quadrilaterals are congruent. 12 cm 10 cm100°105° 85° E HF G x° 100° 85° NOT TO SCALE (a) Write down the side of quadrilateral EFGH that must be 10 cm long. [1] (b) Work out the value of x. x =  [2]

7 © UCLES 2018 1112/01/O/N/18 [Turn over 11 The students in Class 9L have a test. The table shows some information about their marks. Mark Frequency 0 – 9 10 – 19 11 20 – 29 30 – 39 4 There are 28 students in the class. The modal class interval is 20 – 29 The lowest mark is 7 marks. Complete the frequency column. [2] 12 Two fractions are 4 5 and 54 Write down which fraction is closer to 1 Explain your answer. is closer to 1 because [1]

8 © UCLES 2018 1112/01/O/N/18 13 Tick ( ) to show whether each of these facts about the line y = 3 x − 2 is true or false. True False The line passes through the point (7, 19) When x goes up by 1, y increases by 3 The line is parallel to the line y = 4 x – 2 The line is steeper than the line y = 2 x + 1 [2]

9 © UCLES 2018 1112/01/O/N/18 [Turn over 14 Blessy has two bags containing numbered counters. Bag A Bag B 12 4 3 1246 3 She takes one counter at random from Bag A and another counter at random from Bag B. She adds the numbers on her two counters. Find the probability that Blessy’s answer is more than 6 [3]

10 © UCLES 2018 1112/01/O/N/18 15 Complete the boxes in this diagram. 4500 –10 –1 ×10 ×10 –4 – 0.01 [2] 16 Complete the multiplication grid. × 8 0.2 …………..…6.4 …………..… 0.3 …………..… …………..… [3]

11 © UCLES 2018 1112/01/O/N/18 [Turn over 17 Rajiv is investigating the use of a leisure centre. (a) Tick (  ) to show if these are primary or secondary sources of information. Primary Secondary Rajiv gives questionnaires to people who use the leisure centre. t Rajiv reads a local newspaper article. Rajiv looks at the leisure centre website. [1] (b) Here is one question from Rajiv’s questionnaire. How many times did you use the leisure centre last month? Once 2 or 3 times 4 or 5 times More than 6 times Tick one box. Describe one error in this question. [1]

12 © UCLES 2018 1112/01/O/N/18 18 A dentist is investigating this question. “Do people who use an electric toothbrush have healthier teeth than those who use a normal toothbrush?” She examines each patient’s teeth and gives the teeth a score. Patients with lower scores have healthier teeth. Her results are shown in the diagram. 7 7 5 0 5 6 7 8 8 9 Use a normal toothbrush Use an electric toothbrush sample size = 27 sample size = 23 Key: 0│3│1 represents a score of 30 for a patient using a normal toothbrush and a score of 31 for a patient using an electric toothbrush9 9 8 5 4 2 0 1 0 0 1 3 4 5 5 6 7 9 8 5 5 4 3 0 2 0 0 2 3 4 5 5 6 6 5 3 2 0 3 1 2 6 8 0 4 Work out an appropriate average for both groups. Name of average used Average score for patients who use a normal toothbrush Average score for patients who use an electric toothbrush Write a conclusion to the dentist’s question using this information. [3]

13 © UCLES 2018 1112/01/O/N/18 [Turn over 19 The diagram shows the sketch of a net of a triangular prism. 15 cm 10 cm 6 cm 8 cmNOT TO SCALE Work out the total surface area of the prism. cm 2 [3]

14 © UCLES 2018 1112/01/O/N/18 20 A tap fills a container with water at a rate of 0.25 litres per second. It takes 2 17 minutes to fill the container from empty. Work out the amount of water in the full container. litres [2] 21 (a) Write down the order of rotational symmetry of a parallelogram. [1] (b) Write down the number of lines of symmetry of a parallelogram. [1]

15 © UCLES 2018 1112/01/O/N/18 [Turn over 22 The diagram shows a triangle, A, and the line, y = x, drawn on a grid. – 6–5– 4–3–2–10 1 4 5 –21 2 3 4 5 A 23 6 y x –3 –1 –2 –36 – 4 –5 – 6 7 –7y = x Triangle A is reflected in the line y = x . The new triangle is then reflected in the y-axis. Describe fully the single transformation which maps triangle A to its final position. [3]

16 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. © UCLES 2018 1112/01/O/N/18 23 The graph of 2 x + 4 y = 15 is a straight line. Work out the gradient of the line. [1]