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Questions 1 to 10, 3 marks each
1.
The expression 3x(x − 4) − 2(5 − 3x) equals
(A) 3x
2
− 3x − 14
(B) 3x
2
− 6x − 10
(C) 3x
2
− 18x + 10
(D) 3x
2
− 18x − 10
(E) 9x
2
− 22x
2.
A coach notices that 2 out of 5 players in his club are studying at university. If
there are 12 university students in his club, how many players are there in total?
(A) 20
(B) 24
(C) 30
(D) 36
(E) 60
3.
The value of 14 ÷ 0.4 is
(A) 3.5
(B) 35
(C) 5.6
(D) 350
(E) 0.14
4.
In the diagram, ABCD is a square. What
is the value of x?
(A) 142
(B) 128
(C) 48
(D) 104
(E) 52
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...... ...... ...... ...... ... ...... ...... ...... ... ......52
◦
x
◦
A
B
C
D
5.
Which of the following is the largest?
(A) 210
(B) 2
10
(C) 10
2
(D) 20
1
(E) 21
0
6.
If m and n are positive whole numbers and mn = 100, then m + n cannot be equal
to
S 2
7.
P QRS is a square. T is a point on RS
such that QT = 2RT .
The value of x is
(A) 100
(B) 110
(C) 120
(D) 150
(E) 160
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..P
Q
R
S
T
x
◦
8.
In my neighbourhood, 90% of the properties are houses and 10% are shops. Today,
10% of the houses are for sale and 30% of the shops are for sale. What percentage
of the properties for sale are houses?
(A) 9%
(B) 80%
(C) 33
1
3
%
(D) 75%
(E) 25%
9.
The value of
1
2
+
1
4
+
1
8
2 + 4 + 8
is
(A) 16
(B) 4
(C) 1
(D)
1
4
(E)
1
16
10.
Anne’s morning exercise consists of walking a distance of 1 km at a rate of 5 km/h,
jogging a distance of 3 km at 10 km/h and fast walking for a distance of 2 km at
6 km/h.
How long does it take her to complete her morning exercise?
(A) 30 min
(B) 35 min
(C) 40 min
(D) 45 min
(E) 50 min
Questions 11 to 20, 4 marks each
11.
The diagram shows a square of side
length 12 units divided into six triangles
of equal area.
What is the distance, in units, of T from
the side P Q?
(A) 4
(B) 3
(C) 2
(D) 1
(E)
√
5
...... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...... ...... ...... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...P
S
Q
R
T
12.
Each of the first six prime numbers is written on a separate card. The cards are
shuffled and two cards are selected. The probability that the sum of the numbers
selected is prime is
(A)
1
5
(B)
1
4
(C)
1
3
(D)
1
2
(E)
1
6
13.
Two tourists are walking 12 km apart along a flat track at a constant speed of
4 km/h. When each tourist reaches the slope of a mountain, she begins to climb
with a constant speed of 3 km/h.
✲
✛
12 km
✡
✡
✡
✣
✑
✑
✸
✑
✑
✰
? km
What is the distance, in kilometres, between the two tourists during the climb?
(A) 16
(B) 12
(C) 10
(D) 9
(E) 8
14.
Lines parallel to the sides of a rectangle 56 cm by 98 cm and joining its opposite
edges are drawn so that they cut this rectangle into squares. The smallest number
of such lines is
(A) 3
(B) 9
(C) 11
(D) 20
(E) 75
15.
What is the sum of the digits of the positive integer n for which n
2
+ 2011 is the
square of an integer?
(A) 6
(B) 7
(C) 8
(D) 9
(E) 10
16.
Of the staff in an office, 15 rode a pushbike to work on Monday, 12 rode on Tuesday
and 9 rode on Wednesday.
If 22 staff rode a pushbike to work at least once during these three days, what is
the maximum number of staff who could have ridden a pushbike to work on all
three days?
S 4
17.
How many integer values of n make n
2
− 6n + 8 a positive prime number?
(A) 1
(B) 2
(C) 3
(D) 4
(E) an infinite number
18.
If x
2
− 9x + 5 = 0, then x
4
− 18x
3
+ 81x
2
+ 42 equals
(A) 5
(B) 25
(C) 42
(D) 67
(E) 81
19.
The centre of a sphere of radius 1 is one of the vertices of a cube of side 1.
What is the volume of the combined solid?
(A)
7π
6
+ 1
(B)
7π
6
+
5
6
(C)
7π
6
+
4
3
(D)
7π
8
+ 1
(E) π + 1
20.
In a best of five sets tennis match (where the first player to win three sets wins the
match), Chris has a probability of
2
3
of winning each set. What is the probability
of him winning this particular match?
(A)
2
3
(B)
190
243
(C)
8
9
(D)
19
27
(E)
64
81
Questions 21 to 25, 5 marks each
21.
How many 3-digit numbers can be written as the sum of three (not necessarily
different) 2-digit numbers?
(A) 194
(B) 198
(C) 204
(D) 287
(E) 296
22.
A rectangular sheet of paper is folded along a single line so that one corner lies
on top of another. In the resulting figure, 60% of the area is two sheets thick and
40% is one sheet thick. What is the ratio of the length of the longer side of the
rectangle to the length of the shorter side?
23.
An irrational spider lives at one corner of a closed box which is a cube of edge 1
metre. The spider is not prepared to travel more than
√
2 metres from its home
(measured by the shortest route across the surface of the box). Which of the
following is closest to the proportion (measured as a percentage) of the surface of
the box that the spider never visits?
(A) 20%
(B) 25%
(C) 30%
(D) 35%
(E) 50%
24.
Functions f , g and h are defined by
f (x) = x + 2
g(0) = f (1)
g(x) = f (g(x − 1))
for x ≥ 1
h(0) = g(1)
h(x) = g(h(x − 1))
for x ≥ 1.
Find h(4).
(A) 61
(B) 117
(C) 123
(D) 125
(E) 313
25.
A cone has base diameter 1 unit and slant height 3 units. From a point A halfway
up the side of the cone, a string is passed twice around it to come to a point B
on the circumference of the base, directly below A. The string is then pulled until
taut.
... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...... ...... ...... ...... ...... ...... ...... ...... ...... ... ...... ... ... ... ... ... ... ...... ...... ... ...... ... ... ... ... ... ...... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...A
B
How far is it from A to B along this taut string?
(A)
3
8
(
√
29 +
√
53)
(B)
3
√
7
2
(C)
3
√
3
2
(D)
9
4
(E)
3
√
108
8
S 6
For questions 26 to 30, shade the answer as an integer from 0 to 999 in
the space provided on the answer sheet.
Question 26 is 6 marks, question 27 is 7 marks, question 28 is 8 marks,
question 29 is 9 marks and question 30 is 10 marks.
26.
Paul is one year older than his wife and they have two children whose ages are also
one year apart. Paul notices that on his birthday in 2011, the product of his age
and his wife’s age plus the sum of his children’s ages is 2011.
What would have been the result if he had done this calculation thirteen years
before?
27.
The diagram shows the net of a cube. On each face there is an integer: 1, w, 2011,
x, y and z.
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ... ... ... ... ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ... ... ... ... ... ... ... ... ... ... ....x
y
2011
z
w
1
If each of the numbers w, x, y and z equals the average of the numbers written on
the four faces of the cube adjacent to it, find the value of x.
28.
Two beetles sit at the vertices A and H of a cube ABCDEF GH with edge length
40
√
110 units. The beetles start moving simultaneously along AC and HF with
the speed of the first beetle twice that of the other one.
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...... ...... ...... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...... ...... ... ...... ...
