Which of the following correctly expresses 48 as a product of prime factors?
Trả lời
(D)
2 x 2 x 2 x 2 x 3
2
Evaluate \((20_{three})^2 - (11_{three})^2\) in base three
Trả lời
(C)
202
3
Evaluate \(log_{10}5 + log_{10}20\)
Trả lời
(A)
2
4
In a class of 80 students, every students studies Economics or Geography or both. If 65 students study Economics and 50 study Geography, how many study both subjects?
Trả lời
(C)
35
5
If N varies directly as M and N = 8 when M = 20 find M when N = 7
Trả lời
(C)
\(17\frac{1}{2}\)
6
Express 0.0462 in standard form
Trả lời
(D)
4.62 x 10-2
7
In a bag of oranges, the ratio of the good ones to the bad ones is 5:4. If the number of bad oranges in the bag is 36, how many oranges are there in the altogether?
Trả lời
(A)
81
8
A boy estimated his transport fare for a journey as N190 instead of N200. Find the percentage error in his estimate
A man is four times as old as his son. The difference between their ages is 36 years Find the sum of their ages
Trả lời
(C)
60 years
13
Given that y = px + q and y = 5 when x = 3, while y = 4 when x = 2, find the value of p and q.
Trả lời
(B)
p = 1, q = 2
14
Evaluate \(\frac{x^2 + x - 2}{2x^2 + x -3}\) when x = -1
Trả lời
(D)
1
15
Factorize \(6x^2 + 7x - 20\)
Trả lời
(D)
(3x-4)(2x+5)
16
Simplify \(\frac{2x-1}{3}-\frac{x+3}{2}\)
Trả lời
(C)
\(\frac{x-11}{6}\)
17
If \(\frac{y-3}{2}<\frac{2y-1}{3}\), which of the following is true?
Trả lời
(C)
y > -7
18
if \(\frac{4m+3n}{4m-3n}=\frac{5}{2}\), find the ratio m:n
Trả lời
(A)
7:4
19
If \(2x^2 + kx - 14 = (x+2)(2x-7)\), find the value of K
Trả lời
(A)
-3
20
which of the following is not quadratic expression?
Trả lời
(D)
y = 5(x-1)
21
The graph of the curve \(y = 2x^2 - 5x - 1\) and a straight line PQ were drawn to solve the equation \(2x^2 - 5x + 2 = 0\)
What is the equation of the straight line PQ?
Trả lời
(D)
y = -3
22
Subtract (-y + 3x + 5z) from (4y - x - 2z)
Trả lời
(A)
5y - 4x - 7z
23
If \(y \propto \frac{1}{\sqrt{x}}\) and x = 16 when y = 2, find x when y = 24
Trả lời
(A)
\(\frac{1}{9}\)
24
If 2x : (x +1) = 3:2, what is the value of x?
Trả lời
(D)
3
25
The bearing S40°E is the same as
Trả lời
(D)
140o
26
Given that sin \(P = \frac{5}{13}\), where p is acute, find the value of cos p - tan p
Trả lời
(A)
\(\frac{79}{156}\)
27
Three observation posts P,Q and R are such that Q is due east of P and R is due north of Q. If |PQ| = 5km and |PR| = 10km, find |QR|
Trả lời
(D)
8.7km
28
Express 25° 45' in decimal (Hint: 1° = 60')
Trả lời
(A)
25.75o
29
A box contains 5 red, 3 green and 4 blue balls. A boy is allowed to take away two balls from the box. What is the probability that the two balls are red?
Trả lời
(A)
\(\frac{5}{33}\)
30
A box contains 5 red, 3 green and 4 blue balls. A boy is allowed to take away two balls from the box.What is the probability that one is green and the other is blue?
Trả lời
(A)
\(\frac{2}{11}\)
31
If the probability that an event will occur is p and the probability that it will not occur is q, which of the following is true?
Trả lời
(C)
p+q=1
32
What is the range of their age?
Trả lời
(B)
20 years
33
What is the mode?
Trả lời
(C)
24.0 years
34
How many students are there in the group?
Trả lời
(C)
52
35
Which of the following is not the the size of an exterior angle of a regular polygon?
Trả lời
(D)
21o
36
In the diagram, PQR is a triangle.|PQ| = |PR|, |PS| = |SQ| and PRS = 50°. What is the size of ∠PSQ?
Trả lời
(B)
80o
37
PQRS is a rhombus of side 16cm. The diagonal |QS| = 20cm. Calculate, correct to the nearest degree, ∠PQR
Trả lời
(D)
103o
38
In the diagram, PQ is a diameter of the circle and ∠PRS = 58°. Find ∠STQ.
Trả lời
(B)
32o
39
A chord of length 30cm is 8cm away from the center of the circle. What is the radius of the circle? Take \(\pi =\frac{22}{7}\)
Trả lời
(B)
17cm
40
A sector of a circle radius 14 cm subtends an angle 135° at the center of the circle. What is the perimeter of the sector? Take \(\pi = \frac{22}{7}\)
Trả lời
(B)
61cm
41
In the diagram, MN||PQ, |LM| = 3cm and |LP| = 4cm. If the area of ∆LMN is 18cm2, find the area of the quadrilateral MPQN
Trả lời
(C)
14cm2
42
The diagram shows a triangular prism of length 7cm. The right - angled triangle PQR is a cross section of the prism |PR| = 5cm and |RQ| = 3cm. What is the area of the cross-section?
Trả lời
(B)
6cm2
43
The diagram shows a triangular prism of length 7cm. The right - angled triangle PQR is a cross section of the prism |PR| = 5cm and |RQ| = 3cm. What is the volume of the prism?
Trả lời
(B)
42cm2
44
A solid cylinder of radius 7cm is 10 cm long. Find its total surface area.
Trả lời
(D)
\(238\pi cm^2\)
45
PQRS is a trapezium in which |PS| = 9cm, |QR| = 15cm, |PQ| = \(2\sqrt{3}, \angle PQR = 90^o and \angle QRS = 30^o\). Calculate the area of the trapezium
