Download [PDF] October 2018 CAIE P1 Mark Schemes 0845 Mathematics Cambridge Primary Checkpoint

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This document consists of 8 printed pages. IB18 10_0845_01/3RP © UCLES 2018 [Turn over Cambridge International Examinations Cambridge Primary Checkpoint MATHEMATICS 0845/01 Paper 1 October 2018 MARK SCHEME Maximum Mark: 40 Published 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 Markers were instructed to award marks. It does not indicate the details of the discussions that took place at an Markers’ 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 End of Series Report. Cambridge will not enter into discussions about these mark schemes. Mark scheme annotations and abbreviations M1 method mark A1 accuracy mark B1 independent mark FT follow through after error dep dependent oe or equivalent cao correct answer only isw ignore subsequent working soi seen or implied

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 2 of 8 Question Answer Marks Further Information 1 E2 1 Do not accept 2E 2 166 (magazines) 1 3 C B D A 1 Do not accept reverse order. Allow 40°, 90°, 100°, 130° ±1 4 60 (people) 1 5 All 5 numbers correct: × 3 5 9 4 12 20 36 6 18 30 54 2 6 10 18 2 3 or 4 correct numbers B1 6(a) 35 1 6(b) ‘No’ must be ticked, together with an explanation that the twelfth number in the sequence is even, not odd, for example: • 12 × 5 is 60 (which is even or is not odd) • the sequence goes odd, even, odd, even so the twelfth number will be even • odd × even = even • all the even multiples of 5 are even • 60 (is even) • the twelfth number is 60 1 Do not accept ‘No’ without a valid explanation. Accept alternative wording. Do not accept just ‘The twelfth number is even’. Explanation must be mathematically correct and calculations must relate to 12 × 5 and or 60

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 3 of 8 Question Answer Marks Further Information 7 20 (cm) 1 8 5 (days) 1 Accept a list, or clear indication of: Monday, Tuesday, Wednesday, Saturday, Sunday 9 5.3 + 4.7 or 5.7 + 4.3 1 Numbers can be in either order. 10 (x =) 56 (°) 1 11 3 52 1 Do not accept 3.4 12 63 (mm) 1 Allow any answer between 61 mm and 65 mm. Do not accept answer in centimetres. 13 6750 700 68 6651 7000 1 Accept alternative, unambiguous indications of the correct answer. 14(a) isosceles and Explanation that 2 sides are equal or Explanation that 2 angles are equal 1 Do not award the mark for isosceles with no explanation. Allow ‘Because it has (only) one line of symmetry.’ 14(b) scalene and Explanation that all sides are different lengths or Explanation that all angles are different sizes 1 Do not award the mark for scalene with no explanation. Allow ‘has no line of symmetry’

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 4 of 8 Question Answer Marks Further Information 15 225 (grams) 1 16(a) They are all square numbers. 1 Accept the mark for recognition that they are all a number multiplied by itself, e.g. 4 × 4, 5 × 5, 6 × 6, 7 × 7, 8 × 8 Allow a × a = b or similar 16(b) 81 1 17 A C D B 1 Accept the correct times listed in order: 6:55 7:30 9:10 9:45 18 IN OUT 1.5 150 9.37 937 6.2 620 0.49 49 0.07 7 2 All 4 numbers correct. 2 or 3 numbers correct B1 19 ($)198 oe 1

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 5 of 8 Question Answer Marks Further Information 20(a) 19 (cents) 1 20(b) Apple ticked, together with calculations showing that an orange costs less than an apple, for example: • 88 ÷ 5 = 17r3 which is less than 19 • 88 ÷ 5 = 17.6 which is less than 19 • 19 × 5 = 95 cents which is more than 88 cents or An explanation that the difference in price between 5 oranges and 4 apples is 12 cents which is not enough to buy an apple. If part (a) incorrect with an answer less than 17.6 and calculation for orange in part (b) is correct e.g. 88 ÷ 5 = 17.6 then the conclusion that the orange costs more to be marked correct as follow through. 1 Do not award mark for apple ticked without correct justification. 21 17 and 29 or 71 and 29 1 Accept answers in any order 22 0.9 1 23 25(%) 1

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 6 of 8 Question Answer Marks Further Information 24 + 5 14 38 2or + 5 14 38 2 + 51 4 38 2or + 5 14 3 8 2 or 1 25(a) Even (chance) 1 Accept fifty-fifty, 50%, 6 3, or equivalent fractions. 25(b) Impossible or No chance 1 Accept 0 or zero. 26 9 1

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 7 of 8 Question Answer Marks Further Information 27 (true) true false true true 2 All entries must be correct for the award of 2 marks. Accept any unambiguous indication of the correct answer. Any three correct entries. B1

0845/01 Primary Checkpoint Mathematics - Mark Scheme October 2018 Page 8 of 8 Question Answer Marks Further Information 28 Number who walk to school Number who do not walk to school Total Number of Boys 9 6 15 Number of Girls 3 12 15 Total 12 18 30 2 All 6 boxes correct. 3, 4 or 5 boxes correct. or Either first or second column correct and all columns totaling correctly and correct follow through total for rows E.g. Number who walk to school Number who do not walk to school Total Number of Boys 9 12 21 Number of Girls 3 6 9 Total 12 18 30 M1 29 10.8 (metres) 1 30 1005 or 0.05 or five hundredths 1 Do not accept hundredths or 100 1 Do not accept 5 hundreds. Allow 201 31 68 1