Download [PDF] April 2016 CAIE P1 Mark Schemes 1112 Mathematics Cambridge Lower Secondary Checkpoint

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[PDF] April 2016 CAIE P1 Mark Schemes 1112 Mathematics Cambridge Lower Secondary Checkpoint.pdf | Plain Text

This document consists of 10 printed pages. IB16 05_1112_01/3RP © UCLES 201 6 [Turn over Cambridge International Examinations Cambridge Secondary 1 Checkpoint M ATHEM ATICS 1112/01 Paper 1 April 2016 MARK SCHEME Maximum Mark : 50 IMPORTANT NOTICE Mark Schemes have been issued on the basis of one copy per Assistant examiner and two c opies per Team Leader.

2 © UCLES 2016 1112/01/A/M/16 Question number 1 Part Mark Answ er Further Information (a) 1 5 : 23 pm Do not accept 5 23 without pm . (b) 1 44 (minutes) Total 2 Question number 2 Part Mark Answ er Further Information (a) 1 8.437 (b) 1 117.6 Tota l 2 Question number 3 Part Mark Answ er Further Information 1 Draws 3 correct lines Total 1

3 © UCLES 2016 1112/01/A/M/16 [Turn over Question number 4 Part Mark Answ er Further Information (a) 1 (b) 1 True False 15 2 = 225  72 144 =  64 4 2=  Total 2 Question number 5 Part Mark Answ er Further Information 2 14, 26 Award 1 mark for each correct answer. Total 2 Question number 6 Part Mark Answ er Further Information 1 Because 3 + 5 + 7 + 9 = 24, which i s a multiple of 3 Award mark if 24 is seen and an indication that this is a multiple of 3 e.g. 3 × 8 = 24 Do not accept explanations which use specific calculations e.g. 3579 ÷ 3 Total 1

4 © UCLES 2016 1112/01/A/M/16 Question number 7 Part Mark Answ er Further Information (a) 1 2 3 2 or equivalent mixed number Do not accept 3 8 (b) 1 9 Total 2 Question number 8 Part Mark Answ er Further Information (a) 1 (4, –2) Do not accept (x = 4, y = −2) (b) 1 (1, 1) Do not accept ( x = 1, y = 1) Total 2 Question number 9 Part Mark Answ er Further Information (a) 1 (Day) 7( th) (b) 1 4 (cm) (c) 1 A correct conclusion, e.g. * the bean plant getting full sun grew taller/faster /better * the more sun, the taller/faster /better the plant grew Total 3

5 © UCLES 2016 1112/01/A/M/16 [Turn over Question number 10 Part Mark Answ er Further Information 1 –10 Total 1 Question number 11 Part Mark Answ er Further Information 2 75 (m 2) Award 1 mark for 110 – their 35 or 60 + their 15 or 33 + their 42 or 110 and 35 seen or 60 and 15 seen or 33 and 42 seen Total 2 Question number 12 Part Mark Answ er Further Information 1 x  6x – 8  x  2x x  4x – 6 x  x 2  Total 1

6 © UCLES 2016 1112/01/A/M/16 Question number 13 Part Mark Answ er Further Information (a) 1 1 31 (km) or equivalent, e. g. 34 (b) 1 3 8 5 (km) or equivalent, e.g. 8 29 Total 2 Question number 14 Part Mark Answ er Further Information 1 Square can be in any orientation. Accept the following arrangement: Total 1 Question number 15 Part Mark Answ er Further Information 1 4 (litres) Total 1

7 © UCLES 2016 1112/01/A/M/16 [Turn over Question number 16 Part Mark Answ er Further Informati on (a) 1 874.59 Do not accept 874.590 (b) 1 870 Do not accept 870.0 Total 2 Question number 17 Part Mark Answ er Further Information 2 Red Green Blue Yellow Frequency 64 48 56 32 Relative frequency 0.32 0.24 0.28 0.16 Award 1 mark if 2 entr ies are correct. Total 2 Question number 18 Part Mark Answ er Further Information 1 No and an explanation, e.g. When the income is high the age can be high or low or When age is x , income can be high or low No mark without some explanation Total 1

8 © UCLES 2016 1112/01/A/M/16 Question number 19 Part Mark Answ er Further Information (a) 1 4 + 9 × (6 – 4) = 22 (b) 1 24 ÷ (12 – 8 + 2) = 4 Total 2 Question number 20 Part Mark Answ er Further Information 2 200 (cm 2) Award 1 m ark for identifying the side length of the square as 5 cm. This could be implied by stating the area of the small square is 25 cm 2. or 20 associated with the length/longer side of the rectangle. or 10 associated with the width/shorter side of the rec tangle. Total 2

9 © UCLES 2016 1112/01/A/M/16 [Turn over Question number 21 Part Mark Answ er Further Information 2 ($)1.89 (00) Award 1 mark either for 5.40 × 0.35 seen or 54 × 35 seen or 0.0054 × 350 seen or for sight of the digits 189 or for correct method with at most 1 error. e.g. 5.40 = 1000 g 0.54 = 100 g 0.26 = 50 g (error) 3 × 0.54 + 0.26 = 1.88 Total 2 Question number 22 Part Mark Answ er Further Information 1 33 (cm 2) Total 1 Question number 23 Part Mark Answ er Further Information 2 ( < > = Award 1 mark for 3 correct symbols. Total 2

10 © UCLES 2016 1112/01/A/M/16 Question number 24 Part Mark Answ er Further Information 1 Total 1 Question number 25 Part Mark Answ er Further Information (a) 2 20 (cm) Award 1 mark for 8 160 or For sight of 140 (b) 1 3 2 Total 3 Question number 26 Part Mark Answ er Further Information 2 (x =) 46 (°) (y =) 67 (°) Award 1 mark for each correct answer. Total 2 

11 © UCLES 2016 1112/01/A/M/16 [Turn over Question number 27 Part Mark Answ er Further Information (a) 1 The 0.2 and 2 cards may be swapped over. (b) 1 40 Total 2 Question number 28 Part Mark Answ er Further Information 3 .. .......... ..........2 . 12 km .. .......... .......... 064 ° .. .......... ..........2 . 13 8 . 12 −km .. .......... .......... 149 145 − ° .. .......... ..........0 . 19 6 . 18 −km .. .......... .......... 289 285 − ° Award 2 marks if 3 answers lie within the given ranges. Award 1 mark if 2 answers lie within the given ranges. Total 3