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Selangor Trial 2022 Mathematics Kertas 1 · Set 1

1
A number, n is rounded off correct to three significant figures to be 4.30. Which of the following is the possible value of n?
2
Diagram 1 shows the picture of the Sun in the shape of sphere. According to Wikipedia, the radius of the Sun is 696 342 km. Calculate the surface area, in km^2, of the Sun. State the answer in standard form correct to three significant figures. (Use \pi = 3.142)
3
Kilang Roti Maju produces 2.64 million loaves of bread a week. The factory operates 7 days a week and 24 hours a day. Calculate the average profit per hour if the net profit of one loaf of bread is 47 cents. State the answer to the nearest RM.
4
State the value of the digit 7 in the number 20761_9 in base ten.
5
Given that 1110_3 < x_10 < 60_7. List down all the integers of x.
6
Diagram 2 shows a pentagon QRSTU and PQR is a straight line. Find the value of x.
7
Diagram 3 shows a regular hexagon PQRSTU. Find the value of y.
8
Diagram 4 shows a circle with centre O. KON is a diameter of the circle. Find the value of p.
9
In Diagram 5, MLN is a tangent to the circle JKL at point L. Find the value of z.
10
Diagram 6 shows the triangle PQR and the quadrant of the circle RST. Given that PR = QR = 4 cm. S and T are the midpoints for PR and RQ respectively. Which of the following shaded areas represents the locus of point X in triangle PQR with XR more than 2 cm or equal from point R and less than 2 cm from side PR?
11
Table 1 shows the number of balls in a box. | Warna Colour | Biru Blue | Kuning Yellow | Hijau Green | |---|---|---|---| | Bilangan Number | x | 20 | 12 | Hakimi takes a ball randomly from the box. The probability of him getting a green ball is \frac{1}{4}. Calculate the probability of Hakimi choosing the ball that is not yellow.
12
Encik Mikhael and Puan Hazirah have 3 children, namely Izzul, Syasya and Amer. Izzul is x years old, Syasya is y years old while Amer is 2 years older than Syasya. Which of the following expressions represents the total ages of their three children?
13
Nadia has bake a rectangular chocolate cake measuring (6x + 4) cm long and (2x + 4) cm wide. She has cut the chocolate cake to 6 parts long and 4 parts wide. Calculate the top surface area of a piece of the chocolate cake.
14
A branch manager of a clothing store is paid a salary 3 times that of a part-time worker, RMx per hour. The working time for the part-time worker is half of the manager's working time, y hours in the day. If they work for 26 days a month, express the difference in salary, RMz between the two workers in terms of x and y.
15
Given that the area for the shape P and shape Q is 16 cm^2 and 36 cm^2. If the shape Q is the image for the shape P under an enlargement, determine the scale factor for the enlargement if the position of the image is on the opposite site of object.
16
Gopal conducted a survey on the hobbies of form five students. Table 2 shows the results of Gopal's survey. Given the number of students who like to sing is half of the number of students who like to dance. The number of students who like to dance is \frac{1}{3} of the total form five students. | Hobi Hobby | Bilangan murid Number of students | |---|---| | Menari Dancing | y | | Membaca Reading | 15 | | Berenang Swimming | 45 | | Menyanyi Singing | x | If a pie chart is drawn to represent the given information, calculate the difference of the angle of the sectors which represent the number of students who like to dance and read.
17
Table 3 shows the distribution of the scores of a group of students in a quiz. | Skor Score | 4 | 5 | 6 | 7 | |---|---|---|---|---| | Kekerapan longgokan Cumulative frequency | 3x | 4x + 4 | 4x + 10 | 4x + 16 | Given that the mean for the data is 5, determine the score mode.
18
The distance between Ipoh town and Petaling Jaya town on map is 4.8 cm. Given the scale used on the map is 1 cm : 50 km. If Benjamin starts driving his car from Ipoh town at 1050 hours and reaches Petaling Jaya town at 1320 hours, calculate the average speed of the car in km h⁻¹.
19
Diagram 7 shows Cheng is observing the top of the building. When he is standing at point O, he finds that the angle of elevation of the top of the building from his eye level is 35°. He then walks 3.5 m towards the building and finds that the angle of elevation of the top of the building becomes 43°. If the height of Cheng's eye level from the horizontal ground is 1.75 m, calculate the height, in m, of the building.
20
In Diagram 8, ROS is a diameter of a unit circle. Find the value of x.
21
Given {(J, J), (J, K), (J, N), (K, L), (K, M), (L, M), (M, N), (M, N)} is edges of a simple graph. Determine the vertices of the simple graph.
22
Diagram 9 shows the undirected graph with weighted. Rizal wants to draw a tree with minimum weight value for the undirected graph. Determine the value of minimum weighted.
23
The area and height of a trapezium is 144 cm^2 and 18 cm respectively. Two parallel sides of the trapezium are x and y. Given that x : y = 1 : 3, calculate the value of x.
24
Diagram 10 shows a speed-time graph for the motion of a particle. Calculate the acceleration for the second 6 seconds.
25
Solve the simultaneous linear inequalities for 5-3w \ge -4 and -4w-2 < 6.
26
Simplify: \frac{5^{4n+2} \times 5^{2n}}{5^{3n-1}}
27
Given 4(8^{3x}) = 1. Calculate the value of x.
28
Mina buys a slice of cake shaped of a rhombus with diagonals 10 cm and 24 cm respectively. Find the perimeter of the upper surface of the cake.
29
Diagram 11 is a Venn diagram with the universal set \xi = M \cup N. Given n(\xi) = 58, n(M) = 40, n(M \cap N) = 12 and n(M') = x + 8. Find the value of x.
30
Given universal set \xi, set R, set S and set T. Which of the following Venn diagram represents the relationships of R \subset S and S \cap T = \{ \}?
31
Diagram 12(a) shows a cuboidal container with base area of 176 cm^2 and height of 6 cm. Diagram 12(b) shows a cylindrical container that has height of 24 cm and radius of 4 cm. Bella poured water into a cuboidal container until it is full. After a while, Bella wants to transfer the water in the cuboidal container into a cylindrical container. After transferring the water, Bella noticed that she needed more water to fill the cylindrical container until full. How much the volume of water, in litre, is Bella needed to fill up the cylindrical container? (Use \pi = \frac{22}{7})
32
Danial wants to buy a pair of branded shoes online based on the promotional price offered from local company and abroad. Sale's promotion detail of two companies given in Table 4 as shown below. | | Syarikat tempatan Local company | Syarikat luar negara Abroad company | |:---|:---|:---| | Harga promosi Promotional price | RM1 200.00 | USD260.00 | | Caj kiriman Shipping charges | 2% daripada harga promosi 2% of promotional price | USD50.00 | | Caj tambahan Additional charges | — | 1% | | | RM1.00 = USD0.24 | | If Danial make a payment by credit card, the bank will charge 1% of additional fee on each transaction from abroad. Choose the correct answer of shoes prices that Danial need to pay to the companies. | | Syarikat tempatan Local company | Syarikat luar negara Abroad company | |:---|:---|:---| | A | RM1 200.00 | RM1 083.33 | | B | RM1 202.00 | RM1 291.33 | | C | RM1 202.00 | RM1 302.49 | | D | RM1 224.00 | RM1 302.49 |
33
Given that p varies directly as square of x and inversely as square root of h. If p = 8 when x = 4 and h = 36, express p in terms of x and h.
34
Table 5 shows the changes in three quantities. Given P varies directly as R and the cube of Q. | P | 103.68 | x | 1.015 | |---|--------|---|-------| | Q | 1.2 | 2 | y | | R | 12 | 0.5 | 7 | Calculate the value of x and of y.
35
Hakimi earns a monthly income of RM6 500.00. He also rents out his house for RM600.00 a month. He has fixed expenses of RM1 600.00 and variable expenses of RM1 500.00 in a month. Calculate Hakimi's monthly cash flow.
36
Given matrix A = \begin{pmatrix} 8 & -1 \\ -4 & 1 \end{pmatrix}, B=k \begin{pmatrix} 1 & 1 \\ h & 8 \end{pmatrix}, with circumstances AB = \begin{pmatrix} 1 & 0 \\ 0 & 1 \end{pmatrix}. Find the values of h and k.
37
Determine the value of x for the following matrix equation: \begin{pmatrix} 4 \\ -5 \end{pmatrix} + 2 \begin{pmatrix} x \\ 3 \end{pmatrix} = \begin{pmatrix} 8 \\ 1 \end{pmatrix}
38
Diagram 13 shows four objects, P, Q, R and S drawn on the square grid. P, R and S are images of Q under an enlargement. Which of the following is true? | | Imej Image | Faktor skala Scale factor | |:--|:-----------|:------------------| | A | P | \frac{1}{2} | | B | R | 2 | | C | Q | \frac{2}{3} | | D | S | \frac{1}{2} |
39
Rishi's motorcycles are covered by motor insurance which has a deductible provision of RM280.00. During the insurance period, Rishi was involved in two accidents. Table 6 shows the losses he suffered. | Kemalangan Accidents | Kerugian Loss | | :------------------- | :------------ | | Pertama First | RM150.50 | | Kedua Second | RM390.00 | State the amount of compensation that can be claimed by Rishi.
40
Puan Elina's earned an annual income of RM112 500.00 in year 2021 including a tax-exempt allowance of RM10 500.00. Her total tax relief is RM26 400.00. In that year, she paid 'zakat fitrah' and gave donations of RM50.50 and RM4 000.00 respectively. Calculate Puan Elina's chargeable income.
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