FORM 1 MATHEMATICS MARKING SCHEME - Curriculum

DIRECTORATE FOR QUALITY AND STANDARDS IN EDUCATION Department of Curriculum Management Educational Assessment Unit

Annual Examinations for Secondary Schools 2015

LEVELS 6 ? 7

FORM 1

MATHEMATICS

MARKING SCHEME

Notes for Marking of Scripts

Types of Marks

M(ethod) marks are awarded for knowing a correct method of solution and attempting to apply it. Method marks cannot be lost for arithmetic mistakes. They can only be awarded if the method used would have led to the correct answer had not an arithmetic mistake been made. In general a correct method is implied by a correct answer and therefore when a correct answer is given and no work is shown, no method marks are lost.

A(ccuracy) marks are given for correct answer only (c.a.o.) Incorrect answers, even though nearly correct, score no marks. Accuracy marks are also awarded for incorrect answers which are correctly followed through (f.t.) from an incorrect previous answer, provided that f.t. is indicated in the marking scheme. No method (M) or accuracy (A) marks are awarded when a wrong method leads to a correct answer.

B marks are accuracy marks awarded for specific results or statements independent of the method used.

Misreading

M marks can still be earned (unless that part of the question is trivialized) but the final A marks are lost.

Crossed out working

An answer or working that is crossed out and not replaced is marked as if it was not crossed out. If the answer or working is replaced, then the crossed out answer or working is ignored and should not be considered for marking.

Units

In general, missing or inaccurate units are not penalised unless otherwise indicated in the marking scheme.

Other

Incorrect working or statement following a correct answer is ignored. Marks are not sub-divisible; no half marks may be awarded. Other abbreviations used:

o.e. (or equivalent) e.e.o.o. (each error or omission) Markers are advised to indicate the M, A or B marks awarded in the body of the script and then write their total in the margin. The total mark for each question should be written in the table included at the top of page 1 of the main paper. This measure facilitates the moderation of papers. Non Calculator Paper

Mathematics Marking Scheme Form 1 Secondary L6 to L7 ? 2015

Page 1 of 5

No.

Answers

1. a(i) 5700 a(ii) 440

b 6000, 6 thousand or thousands

c(i) ?3 c(ii) 542 2. a 18.08 b 9.9 3. a 9

b 5

4. a(i) 4 ? 6 + 8 6

a(ii) 10

b(i) any five from 1, 30, 2, 15, 3, 10, 5, 6 all the above factors

b(ii) 23, 29

5. a b

1 500 250 2 20 1000 (o.e.) 100 = 200

6.

6 5

15 15

11

15

7.

5 cm : 100 cm or 5 : 100

1 : 20

8.

16 25 = 400

400 ? 387

13

Marks

B1 B1

B1

B1 B1

B1

B1

B1

B1

M1 A1 B1

M1 A1 B1 (both correct)

Level Total

6 6

6

5

6

7

2

7

7

2

6/7

6

6

B1

M1

A1

7

3

M1

A1

7

2

M1

A1

6

2

M1

M1

A1

7

3

Total Non Calculator: 25 MARKS

Page 2 of 5 2015

Mathematics Marking Scheme Form 1 Secondary L6 to L7 ?

Main Paper

No.

Answers

Marks

1. a(i) ?

B1

a(ii) +

B1

b

first and last numbers correct

M1

0.0798, 0.798, 7.89, 7.98, 9.8

A1

c(i) 23.5 (o.e.)

B1

c(ii) 24.25 (o.e.)

B1

2. a b

108 ? 9 (seen or implied)

M1

12

A1

any 2 multiples of 5 from 15, 20, 25 and 30 M1

15, 20, 25 and 30

A1

3. a

M1 (for correct minute hand) A1 (for correct time)

b

8 + 25

M1

33

A1

4. a

unlikely

B1

b

likely

B1

c

unlikely

B1

5. a(i) 100

B1

a(ii) 80, 100

B1

a(iii) no mode (o.e.)

B1

b

addition of numbers = 84

M1

84

M1

7

12

A1

6. a

odd

B1

b

multiples

B1

c

square

B1

Level Total

7

7

6

6

7

6

4

6

7

4

6

6

6

3

6

7

6

7

7

7

3

Mathematics Marking Scheme Form 1 Secondary L6 to L7 ? 2015

Page 3 of 5

No.

Answers

Marks

Level Total

7.

drawing of arc, any radius (seen)

M1

drawing of second arc using same radius M1

and cutting the former arc (seen)

line drawn from A to form angle

A1

8. a(i) 3

B1

a(ii) 7x 56

M1

x 8

A1

b(i) 4, 320

B1

b(ii) using a letter to represent the cost of a

M1

muffin

4x 320 (any letter may replace x)

M1

b(iii) x 320

M1

4

x 80

A1

7

3

7

7

8

9.

B4 (?1 for every 2

cube

6

8

12

incorrect answers)

cuboid

6

8

12

square based pyramid

5

5

8

6

4

10. a(i) AB marked parallel to DC BC marked parallel to AD

a(ii) isosceles triangle

a(iii) 40

M1

M1

M1 (spelling not

penalised)

A1

6/7

b(i) attempt at drawing rectangle

b(ii) rectangle b(iii) 50 + 75 + 50 + 75

250

M1 M1 (correct diagram) A1 M1 A1

7

9

11. a(i) 55 (?1?) a(ii) acute

M1

A1

6

b(i) greater than

M1

b(ii) any two angles greater than 90 and less A1

than 180, together with their addition

6

c(i) 70 c(ii) 180 ? 120 (seen or implied)

60 c(iii) 360 ? 60 ? 140 ? 70 (seen or implied)

90

B1 M1 A1 M1 A1 (f.t.)

7

9

Page 4 of 5 2015

Mathematics Marking Scheme Form 1 Secondary L6 to L7 ?

No.

Answers

12. a(i) the area a(ii) the perimeter

b

missing measurements: 5 cm and 4 cm

(seen or implied)

area of one rectangle = 10 5 = 50

area of other rectangle = 7 4 = 28

(accept any other valid method)

78

c

42 mm = 4.2 cm (seen or implied)

volume = 5.4 3.6 4.2

= 81.648

13. a b c

d

2, ?4, 3 point plotted on grid correct drawing of x 3 correct drawing of y 2

steepness of the graph (o.e.)

Marks

Level Total

B1

B1

7

M1

M1 M1

A1

7

M1

M1

A1 (do not penalise

rounding)

6/7

9

B3 (?1 e.e.o.o.)

6

B1

7

B1

B1

7

B1

7

7

Total Main: 75 MARKS

Mathematics Marking Scheme Form 1 Secondary L6 to L7 ? 2015

Page 5 of 5

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