Mathematics 1 & 2 Answer Scheme (Perak's PMR Trial 2012)
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Transcript of Mathematics 1 & 2 Answer Scheme (Perak's PMR Trial 2012)
SULIT
JABATAN PELAJARAN PERAK
PEPERIKSAAN PERCUBAAN PMR TAHUN 2012MATHEMATICS 50Ogos2012
MATHEMATICS
PERATURAN PEMARKAHAN
ANSWER MATHEMATICS PAPER 1
1 C 21 A
2 C 22 C
3 B 23 A
4 C 24 B
5 B 25 A
6 D 26 D
7 D 27 A
8 B 28 D
9 C 29 A
10 B 30 B
11 C 31 B
12 C 32 B
13 C 33 C
14 A 34 A
15 A 35 B
16 B 36 B
17 B 37 D
18 C 38 C
19 A 39 B
20 A 40 D
MARKING SCHEME MATHEMATICS PAPER 2
No Solution and Mark Scheme Sub
Mark
Full
Mark
1×
or 2
K1
N1 2
2 0.075 or
68.78
K1
N1
2
3(a)
(b)
4 – ( − )
or 5 or 5.5
N1
K1
N1 3
4(a)
(b)
−22
3x – x = 7 + 3 or – 3 – 7 = x – 3x
x = 5
N1
KI
NI3
5 Image A’B’C’ correctly drawn
Note :1. Award N1 :
Any one side drawn correctlyOrCorrect image drawn using dotted linesOrCorrect image drawn by sketching
2. Ignore label
3. Accept gap or extension square grid
4. More than 1 image drawn, deduct 1 mark from N2 mark.
N2 2
6
Point P mark correctly Note :
1. Award P1 if only intersection line drawn
2. Accept < square grid for the point P
P2
2
7(a) (b)
2x + y
w² − 2w − 4w + 8
w² − 6w + 8
N1
K1
N1 3
8(a)
(b)
( 3x + 1 )( x – 1 )
4(x2 − 25) or 4(x2 − 52)
4(x + 5)(x − 5)
P1
P1
N1
3
9
or or
or
or or or
K1
K1
N1 3
10 x ≥ 2
x ≤ 9
2, 3, 5, 7
K1
K1 N1
3
11 3P = Qr + 2r
r (Q+2) = 3P
P1
P1
N1 3
12(a)
(b)
7
or or
N1
K1
N1 3
13(a)
(b)
Age (years)Umur (tahun)
FrequencyKekerapan
Age × FrequencyUmur × Kekerapan
1 10 10
2 8 16
3 7 21
4 6 24
5 9 45
Complete table
or
2.9 or or
N1
K1
N1 3
14
All points plotted correctlyNote: 4 or 3 points plotted correctly – award P1
Straight line passes through all the5 pointsNote: Sketch or dotted line, N0
P2
N1
3
15
Net complete and correctly drawn
Note: 2 or 3 surfaces correctly drawn – award N2 Only one surface correctly drawn – award N1 Sketch or dotted line – award N0
N3
3
16(a)
(b)
(c)
JLNote: JL correctly drawn award P1
i. Arc with centre L and radius 4 units ii. Parallel line 3 units from straight line ML
Mark intersection
P2
K1K1
N1 5
17(a) Correct construction of 60o at Q
Arc 9 0.1 cm from P intersecting any line drawn from Q
Complete diagram
Correct construction of perpendicular line from R to S
N1
N1
N1
K1
(b) 8.4 0.1 cmN1
5
18(a)
(b)
(c)
Uniform scale on the y-axis in the range – 10 y 17
All 7 points correctly plotted
Note: 6 or 5 points plotted correctly – award KIN0
Smooth curve passes through all the 7 points
K1
K2
N1 4
19(a)
(b)
Q or PQR or RQP
QR or RQ
N1
N12
20 Identify RT = 4
Identify PT = 15 – 4
11
N1
K1
N1 3