Question 1
The table shows information about the weights, in kg, of 40 parcels.
| Weight of parcel ( p kg) | Frequency |
| 0 p | 19 |
| 1 p | 12 |
| 2 p | 5 |
| 3 p | 2 |
| 4 p | 2 |
Work out an estimate for the mean weight of the parcels.
(4)
The table shows information about the weights, in kg, of 40 parcels.
| Weight of parcel ( p kg) | Frequency |
| 0 p | 19 |
| 1 p | 12 |
| 2 p | 5 |
| 3 p | 2 |
| 4 p | 2 |
Work out an estimate for the mean weight of the parcels.
(4)
There are some people in a cinema. of the people in the cinema are children. For the children in the cinema,
number of girls: number of boys = 2: 7
There are 170 girls in the cinema.
Work out the number of adults in the cinema.
(5)
Simplify y5y9
(1)
Simplify (2m3)4
(2)
Solve 5(x + 3) = 3 x – 4 Show clear algebraic working.
(3)
Factorise x2 + 2x – 24
(2)
Hence, solve x2 + 2x – 24 = 0
(1)
Here is a Venn diagram.
Write down the numbers that are in the set
A
(1)
B C
(1)
Brian writes down the statement A C = Ø
Is Brian’s statement correct? You must give a reason for your answer.
(1)
One of the numbers in the Venn diagram is picked at random.
Find the probability that this number is in set C
(2)
Work out (3.5 105) ÷ (7
108) Give your answer in standard form.
(2)
M, N and P are points on a circle, centre O. MON is a diameter of the circle.
MP = 3.5 cm PN = 9.7 cm
Angle MPN = 90
Work out the circumference of the circle. Give your answer correct to 3 significant figures.
(4)
Chao bought a boat for HK$160 000 The value of the boat depreciates by 4% each year.
Work out the value of the boat at the end of 3 years. Give your answer correct to the nearest HK$.
(3)
Jalina gets a salary increase of 5% Her salary after the increase is HK$252 000
Work out Jalina’s salary before the increase.
(3)
A = 35 5
73 B = 23
3
74
Find the Highest Common Factor (HCF) of A and B.
(1)
Find the Lowest Common Multiple (LCM) of A and B.
(1)
A = 35 5
73 B = 23
3
74 C = 2p
5q
7U
Given that the HCF of B and C is 23 7 the LCM of A and C is 24
35
52
73
find the value of p, the value of q and the value of U.
(2)
The diagram shows a right-angled triangle.
Five of these triangles are put together to make a shape.
(5)
The cumulative frequency graph shows information about the length, in minutes, of each of 80 films.
Length (minutes)
Use the graph to find an estimate for the interquartile range.
(2)
Clare says,
“More than 35% of these films are over 120 minutes long.”
Is Clare correct? Give a reason for your answer.
(3)
Expand and simplify (2 x – 1)(x + 3)(x – 5)
(3)
Solve 3x2 + 6x – 5 = 0 Show your working clearly. Give your solutions correct to 3 significant figures.
(3)
The diagram shows two straight lines drawn on a grid.
Write down the solution of the simultaneous equations
3 y = 2 x + 6 4 x + 3 y = 24
(1)
Show, by shading on the grid, the region defined by all five of the inequalities
Label the region R.
(3)
L, M and N are points on a circle, centre O. QMT is the tangent to the circle at M.
Find the size of angle NOM.
(1)
Give a reason for your answer.
(1)
The function f is such that
Express the inverse function f–1 in the form f–1(x) =...
(2)
The function g is such that
Find fg (3)
(2)
Which values of x cannot be included in any domain of g?
(2)
A frustum is made by removing a small cone from a large cone. The cones are mathematically similar.
The large cone has base radius U cm and height h cm.
Given that
find an expression, in terms of h, for the height of the frustum.
(4)
The diagram shows parallelogram ABCD.
The point B has coordinates (5, 8)
Work out the coordinates of the point C.
(3)
The point E has coordinates (63, 211)
Use a vector method to prove that ABE is a straight line.
(2)
The diagram shows the curve with equation y = f (x) The coordinates of the minimum point of the curve are (–2, –1)
Write down the coordinates of the minimum point of the curve with equation
(1)
The graph of y = a sin(x – b) + c for –90
x
450 is drawn on the grid below.
Find the value of a, the value of b and the value of c.
(3)
Jack plays a game with two fair spinners, A and B.
Spinner A can land on the number 2 or 3 or 5 or 7 Spinner B can land on the number 2 or 3 or 4 or 5 or 6
Jack spins both spinners. He wins the game if one spinner lands on an odd number and the other spinner lands on an even number.
Jack plays the game twice. Work out the probability that Jack wins the game both times.
(4)
ABC is an isosceles triangle such that
AB = AC A has coordinates (4, 37) B and C lie on the line with equation 3 y = 2 x + 12
Find an equation of the line of symmetry of triangle ABC. Give your answer in the form px + qy = U where p, q and U are integers. Show clear algebraic working.
(5)
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