Mock Test ANS

8/8/2019 Mock Test ANS

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FAIRFIELD METHODIST PRIMARY SCHOOLMATHEMATICS MOCK TEST

PRIMARY FIVE

Answer KeyPaper 1

1. 32. 23. 34. 45. 1

6. 37. 18. 19. 310. 4

11. 412. 413. 414. 115. 4

16. 80 000 / 80 thousand17. 3770

18.10

111notbut

10

21or

10

12

19.73

20. 4921. 322. 7

23.50

33

24. 10525. 1.26

26. 101 x 49 = 4949 [M1, A1]1 + 2 + 3 + 4 [A2]

27. (2 448 214 x 3) 6 = 301 [M1, A1]

28.5

1)

5

21(

3

1= (any equivalent fractions of 1/5) [M1, A1]

29.2

3

7

6,

4

1,

5

1and [A2]

If order is correct but original fractions not written [M1]

30. 15 5 = 3 ; 3 x 4 = 12 [M1, A1]


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Paper 2

1. x (30-10) x 9 = 90 [M1]

Ans: 90 cm2 [A1]

2. x 4 x 2 = 4 [M1]

Ans: 4 units2 [A1]

3. 3 900 300 + 3 900 = 7 500 [M1, A1]

4. 103o 90o = 13o [M1, A1]

5. 1934 x 4 2001 1956 = 3779 [M1, A1]

6. (Note that there are 2 possible final answers: 103o and 257o)360o 241o = 119o [M1]222o 119o = 103o [M1, A1]

or

241o + 222o = 463o [M1]463o 360o = 103o [M1, A1]

or

720o 241o 222 o = 257 o [M2, A1]

or

360 o 241 o = 119 o

360 o 222 o = 138 o [M1 for both steps]

119 o + 138 o = 257 o or 360 o 138 o 119 o = 103 o

[M1, A1]

If only angles are marked in the diagram and the answer is correct, onlyM1, A1 is given.


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7. (a)

1st Throw 2nd Throw 3rd Throw

Outcome 1 Head Head Head

Outcome 2 Head Head Tail

Outcome 3 Head Tail HeadOutcome 4 Tail Head Head

Outcome 5 Head Tail Tail

Outcome 6 Tail Tail Head

Outcome 7 Tail Head Tail

Outcome 8 Tail Tail Tail

[A1] ( mark for each correctly stated outcome)

(b) 1/8 x 100% = 12.5% [M1, A1]

or

1/8 = 12.5% [M1, A1]

or

100% 8 = 12.5% [M1, A1]

8. Greatest sum of the digits of a 2-digit number

Number : 99Sum : 9 + 9 = 18Greatest possible remainder : 17Actual remainder : 99 / 18 = 5 R9

Number : 98 or 89Sum : 9 + 8 = 17Greatest possible remainder : 16Actual remainder : 98 / 17 = 5 R13

89 / 17 = 5 R 4

Number : 97 or 79Sum : 9 + 7 = 16Greatest possible remainder : 15Actual remainder : 97 / 16 = 6 R1

79 / 16 = 4 R15

[M1 Feasible method employed][M1 Correct input of data]Ans : 15 [A1]


4/8

9.5

22 km = 2400 m [M1]

2400 + 1600 + 1000 + 1000 = 6 000 [M1]6 000 m [A1]

10.

117

2.5 cm

63

8 cm

7.5 cm

W X

Z Y

[A2 - Construction ; mark deducted if fails to label WXYZ and 2 arrows]117o (1o) [A1]

If only angles are marked in the diagram and the answer is correct, onlyM1, A1 is given.

11. ABC = 180o 55o 55o = 70o [M2, A1][M1, A1]

12. 270600100

45= (no. of local stamps)

600 270 = 330 (no. of foreign stamps) [M1]

100% - 60% = 40% (new percentage of local stamps)

40% 270

60% 4056040

270= (new no. of foreign stamps) [M1]

405 330 = 75 [M1, A1]

13. BWX = BYX = 110o

Please kindly note: will draw

out actual figure on

transparency after approval.


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s = AWX = 180o - 110o = 70o [M1, A1]

WXY = 180o - 110o = 70o

p = 180o - 70o -70o = 40o [M1, A1]

14. Method 1: Making a listBeforeKey chains 2 4 6 8 10 12 14Pencil holders 3 6 9 12 15 18 21Total 5 10 15 20 25 30 35[M1]

AfterKey chains 5 10 15 20 25Pencil holders 2 4 6 8 10Total 7 14 21 28 35[M1]

[M1] if all data are correct

Answer: 35 [A1]

Method 2Before:

Minimum 2 + 3 = 5 [M1]

After:

Minimum 5 + 2 = 7 [M1]

5 x 7 = 35 [M1, A1]

Method 3KC : PH

= 2 : 3= 14 : 21 [M1]

KC : PH= 5 : 2= 25 : 10 [M1]

7 x 5 = 35 [M1, A1]

15. (a)[M1]

$112.12Phone & Printer left


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12

1[A1]

(b)

06.5612.1122

1= [M1]

56.06 x 8 = 448.48 [M1]

Ans: $448.48 [A1]

[Award M1 if this step is missing but show someunderstanding on the model]

16.

SquareA1 Accurate construction of square

4cm

CDE

A B

6 cm

Solution 1(a) AE = 6 cm

(b) ABCE is a trapezium

D C4cm

Solution 2

(a) AE = 4 cm

(b) ABCE is a triangle

EA B4 cm

E

3 cm

4 cm

D C

A B

Solution 3

(a) AE = 3 cm(b) ABCE * Award full

answer mark regardless

of what the answer is

(blanks inclusive)


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A Accurate labelling of ABCD

TriangleA1 Accurate construction of triangleTriangle ADE must be drawn specifically using side AD from the squareSeparate triangle and square drawn is not accepted

A Label right angle on triangleNo marks awarded if the triangle is not accurately constructedI.e. Must get A1 for triangle construction in order to also get A forlabelling

(a) 3 cm / 4 cm / 6 cm (depending on the type drawn) [A1]Must obtain A1 for construction of triangle in order to be awarded this mark

(b) Trapezium/Trapezoid or Triangle [A1](depending on the type drawn)

All points for the triangle plus square (ABCDE) must belabelled correctly first

Construction mark for triangle is not a prerequisite to getmark for this part

*Important, if pupil has written Trapezium for Solution 2,award zero marks.*

Award marks so long spelling error does not affect theintelligibility of the word

16. (a) Noodle X :$0.25 per 100 g

[M1]Noodle Y:0.60/2.5 = 0.24$0.24 per 100 g

Ans: Noodle X [A1]

Answer mark is contingent on a correct method (I.e. M1)M1 is obtained when a comparison between the Noodles isclearly shown either by equating mass or the price of theNoodles

E.g.

X: 50 g 12.5

Y: 50 g 12Only an answer mark (A1) will be awarded if there is nomethod shown (M0)No marks awarded (A0) if method is incorrect or if the stages


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leading up to a comparison is inaccurate/inadequate (M0)even if pupil states Noodle X as the answer

(b) 3500/100 = 35 [M1]35 x 0.25 = 8.75 [M1]

2 Method marks awarded if pupil gives the answer to part (a)as Noodle Y but shows the correct method and working toobtain $8.40 as the final answer (I.e. Award M2, A0)

Ans: $8.75 [A1]

17. (a) 60/100 x 840 = 504 (adults)840 504 = 336 (children) [M1]1/8 x 336 = 42 (boys)336 42 = 294 (girls)

70% 504

30% 504/70 x 30 = 216 (children left) [M1]

336 216 = 120 [M1, A1]or294 (216 42) = 120

(b) 174 42 = 132 [A1]

OR

(a) Adults Before 60% of 840 = 504(Trick: Adults unchanged!)

Adults After 70% 504Guests After 100% 504/70 x 100 = 720

Girls that left 720 840 = 120

(b) Children Before 840 504 = 336Diff between Boys and Girls Before 6/8 x 336

= 252

Diff between Boys and Girls After 252 120= 132

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