For Multiple choice questions (1-17) select single answer choice.
For Questions 18-20 write the answers in the space below each question.
Working must be shown for all stages of the questions
.
1.
Find the
n
th
term for
the following sequence
1 7 17 31
49
(2 marks)
A)
𝑎
𝑛
= 2𝑛
3
− 1
B)
𝑎
𝑛
= 2𝑛
2
− 1
C)
𝑎
𝑛
= 1 − 2𝑛
2
D)
𝑎
𝑛
= 2𝑛
2
+ 1
2. Seven machines produce 14 000 boxes in 5 hours.
How many boxes would 9 machines produce in 4 hours?
(2 marks)
A) 14000
B) 13600
C) 9600
D) 14400
3.
Write down
one
inequality to show the values of x which satisfy all three of the following
inequalities:
x
< 7,
-2 <
x
< 9,
0
≤
x
< 13
(2 marks)
A)
0 < 𝑥 < 9
B)
0 ≤ 𝑥 < 7
C)
−2 < 𝑥 < 13
D)
−2 < 𝑥 < 7
4. Simplify
𝑥
1−𝑥
−
1−𝑥
2
1+𝑥
2
(
1
(𝑥−1)
2
−
𝑥
1−𝑥
2
)
(2 marks)
A)
𝑥+1
1−𝑥
B)
2𝑥−1
1−𝑥
C)
1
𝑥−1
D)
−1
5. Find the size of angle x
(2 marks)
A)
36
0
B)
48
0
C)
40
0
D)
44
0
Mathematics Entrance Examination 2021
2
6. A patient in hospital is very ill. Between 09.00 and 13.00 one day
the number of viruses in his body goes up from 3.7 x 10
10
to 7.3 x
10
13
. Work out the increase in the number
of viruses, giving your
answer in standard form.
(2 marks)
A)
7.2963 × 10
13
B)
0.7296 × 10
13
C)
72963 × 10
10
D)
72.963 × 10
15
7. Solve the equation
(3−2𝑥)
7
-
(4𝑥+5)
6
= 2
(2 marks)
A)
𝑥 = −
84
40
B)
𝑥 = −
101
40
C)
𝑥 = 1
D)
𝑥 =
101
40
8. A cube has a total surface area of 864 cm
2
. What is the length of one edge of the cube?
(2 marks)
A)
13
B)
6
C)
11
D)
12
9. Find the value of
n
16
5
× 8
4
= 4
3
× 2
n
(2 marks)
A)
𝑛 = 24
B)
𝑛 = 8
C)
𝑛 = 16
D)
𝑛 = 26
10. Find the equations of the following lines and solve the system of linear equations.
(4 marks)
A)
𝑥 = 0.5, 𝑦 = 4
B)
𝑥 = 0, 𝑦 = 3
C)
𝑥 = 2, 𝑦 = 1
D)
𝑥 = 2, 𝑦 = 7
Mathematics Entrance Examination 2021
3
11. In the diagram below all measurements given are 2 cm. Find the value of
x
.
(4 marks)
A)
𝑥 = √10
B)
𝑥 = 3√5
C)
𝑥 = 2√2
D)
𝑥 = 2√5
12. Find
𝑎
and
𝑏
so that
1
𝑎
+
1
𝑏
=
5
8
(4 marks)
A)
𝑎 = 2, 𝑏 = 8
B)
𝑎 = 5, 𝑏 = 2
C)
𝑎 = 8, 𝑏 = 5
D)
𝑎 = 1, 𝑏 = 8
13. Fifty tickets were sold for a concert. Some tickets were sold at $80 each and the rest at
$120 each. The total amount of money spent on tickets was $5200. What percentage of
the tickets sold were $80 tickets?
(4 marks)
A)
30%
B)
40%
C)
80%
D)
50%
14. Simplify, where
𝑡𝑎𝑛(𝑥)
and
𝑐𝑜𝑡 (𝑥)
are
trigonometric functions
(𝑡𝑎𝑛 𝑥 + 𝑐𝑜𝑡 𝑥)
2
− (𝑡𝑎𝑛 𝑥 − 𝑐𝑜𝑡 𝑥)
2
(4 marks)
A)
5
B)
4
C)
1
D) 2tanx
Mathematics Entrance Examination 2021
4
15. Solve given logarithmic equation
𝑙𝑜𝑔
2
(54 − 𝑥
3
) = 𝑙𝑜𝑔
2
(𝑥
3
)
(4 marks)
A)
𝑥 = 3
B)
𝑥 = 4
C)
𝑥 = 2
D)
𝑥 = −2
16. Given that
𝑑𝑦
𝑑𝑥
= 3𝑥
2
− 4𝑥 + 2
and
𝑦 = 5
when
𝑥 = 1
, find
𝑦
in terms of
𝑥
.
(4 marks)
A)
𝑦 = 6𝑥 − 4
B)
𝑦 = 𝑥
3
− 2𝑥
2
+
2𝑥 + 4
C)
𝑦 = 𝑥
3
− 2𝑥
2
+
𝑥 + 5
D)
𝑦 = 3𝑥
3
− 2𝑥
2
+
2𝑥 + 4
17. A line
𝑙
1
has equation
𝑦 = 7 − 6𝑥
. A second line
𝑙
2
is perpendicular to
𝑙
1
and passes
through the point
𝑃(−12; 5)
. Find the equation of
𝑙
2
.
(4 marks)
A)
𝑦 = −6𝑥 + 3
B)
𝑦 = −
1
6
𝑥 + 3
C)
𝑦 = −
1
6
𝑥 + 2
D)
𝑦 =
1
6
𝑥 + 5
18.
Find the area of the shaded region.
(8 marks)
19. If
𝑥
1
and
𝑥
2
are
the roots of the equation
2𝑥
2
− 3𝑎𝑥 − 2 = 0
then calculate
1
𝑥
1
3
+
1
𝑥
2
3
(6 marks)
Mathematics Entrance Examination 2021
5
20. The functions
𝑓
and
𝑔
are given
𝑓(𝑥) = 3𝑥
2
+ 12𝑥 + 4, 𝑔(𝑥) = 𝑥
3
+ 6𝑥
2
+ 9𝑥 − 8
What is the complete set of values of
𝑥
for which one of the functions
is increasing and the
other decreasing?
(6 marks)