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Transcript of Mathematics paper H
HPAPER
DO NOT OPEN THIS BOOKLET UNTIL INSTRUCTED.
STUDENT’S NAME:
Read the instructions on the ANSWER SHEET and fill in your NAME, SCHOOL and OTHER INFORMATION.Use a 2B or B pencil. Do NOT use a pen.Rub out any mistakes completely.
You MUST record your answers on the ANSWER SHEET.
MatheMaticsMark only ONE answer for each question.Your score will be the number of correct answers.Marks are NOT deducted for incorrect answers.
MULTIPLECHOICE QUESTIONS:Use the information provided to choose the BEST answer from the four possible options. On your ANSWER SHEET fill in the oval that matches your answer.
FREERESPONSE QUESTIONS:Write your answer in the boxes provided on the ANSWER SHEET and fill in the oval that matches your answer
You may use a ruler and spare paper.A CALCULATOR is required.
Practice
Questions
international competitions and assessments for schools
ICAS Mathematics Practice Questions Paper H © EAA 2
1. In which picture does the slice match the missing part of the cake?
cake
slice
slice
slice
slice
(A) (B)
(C) (D)
cake
cake cake
2. This is a diagram of a triangle.
NOT TO SCALE
x y(A) 70 120(B) 50 120(C) 70 100(D) 50 100
Which of these cannot be values for x and y ?
NOT TO SCALE
x y(A) 70 120(B) 50 120(C) 70 100(D) 50 100
3. This is a sector graph (pie graph).
carsKey
trucksmotorbikesbicycles
Vehicles Passing the School
90
21
159
What is the angle at the centre for the number of cars passing this school?
(A) 296°(B) 284°(C) 257°(D) 240°
4. In the toy car shown, the diameters of the back wheels are oneandahalf times the diameters of the front wheels.
When the car travels one metre, the back wheels go around 6 times.
How many times do the front wheels go around when the car travels one metre?
(A) 4(B) 6(C) 9(D) 12
3 ICAS Mathematics Practice Questions Paper H © EAA
5. How many numbers between 301 and 400 are divisible by both 3 and 4?
(A) 6(B) 8(C) 12(D) 25
6. Alan and Bill want to make a bottle that will hold about twice as much as the one shown.
height
diameter
Alan wanted to double the height of the bottle. Bill wanted to double the diameter of the bottle.
Who was correct?
(A) neither of them(B) both of them(C) Bill only(D) Alan only
7. This picture is based on the style of the Dutch artist Piet Mondrian (1872–1944).
2
NOT TO SCALE
26
6
4
4
Which expression gives the total area of the three coloured rectangles in the picture?
(A) 6a2 + 48ab – 32b2(B) 20a2 + 24b2(C) 4a2 + 36ab – 24b2(D) 6a2 + 16b2
8. A very large number is represented as shown.
What is the last digit (unit) of this number?
(A) 1(B) 3(C) 7(D) 9
ICAS Mathematics Practice Questions Paper H © EAA 4
9. Ricky is thinking of a positive 3digit number.
‘If I subtract 9 from the number,the result will be divisible by 9.If I subtract 10 from the number,the result will be divisible by 10.If I subtract 11 from the number,the result will be divisible by 11.’
What is the lowest possible number Ricky is thinking of?
10. Katya has a set of Russian dolls. The heights of her dolls are shown. They increase by a fixed ratio.
128
mm
96 m
m
72 m
m
54 m
m
40.5
mm
1.1603 � 10x mm
The smallest doll fits in the next larger doll. They both fit inside the next doll. The largest doll shown fits all four of the other dolls inside it.
Katya calculates the height of the doll that can fit exactly 700 dolls inside it, including the dolls shown.
She writes the answer as:
128
mm
96 m
m
72 m
m
54 m
m
40.5
mm
1.1603 � 10x mm
What is the value of x?
END OF PAPER
QUESTIONS9AND10AREFREERESPONSE.WriteyouranswerintheboxesprovidedontheANSWERSHEETandfillintheovalsthatmatchyouranswer.
5 ICAS Mathematics Practice Questions Paper H © EAA
This page may be used for working.
HPAPER
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FIRST NAME to appear on certificate LAST NAME to appear on certificate
Are you male or female? Male Female
Does anyone in your home usually speak a language other than English? Yes No
School name:
Town / suburb:
Today’s date: Postcode:
CLASSDATE OF BIRTHDay Month Year
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HOW TO FILL OUT THIS SHEET:
• Ruboutallmistakescompletely.• Printyourdetailsclearly intheboxesprovided.• Makesureyoufillinonly oneovalineachcolumn.
EXAMPLE 1: Debbie BachFIRST NAME LAST NAME
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M THE UNIVERSITY OF NEW SOUTH WALES
International Competit ions and Assessments for Schools
PRACTICE QUESTIO
NS
*045910*
PaPer
H
DCBA
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Your privacy is assured as EAA fully complies with appropriate Australian privacy legislation. Visit www.eaa.unsw.edu.au for more details.
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International Competit ions and Assessments for SchoolsM
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MULTIPLE CHOICE FREE RESPONSE
Example: 4+6= Example:6+6=
(A) 2 ●Theansweris12,soWRITEyour (B) 9 answerintheboxes. (C) 10 ●WriteonlyONEdigitineachbox, (D) 24 asshown,andfillinthecorrectoval, asshown.Theansweris10,sofillintheoval,asshown.C
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ICAS Mathematics Practice Questions Paper H © EAA
QUESTION KEY SOLUTION STRAND LEVEL OF DIFFICULTY
1 CThe missing part in C is one third which matches the slice (one third); altogether they complete one whole.
Space and Geometry Easy
2 A The sum of x and y adds to 190° which is more than the angle sum of a triangle (180°).
Space and Geometry Easy
3 D
The total number of vehicles = 135
The angle at the centre for cars = 90135
× 360°
= 240°
Chance and Data Medium
4 C
Let D be the diameter of the big wheel (back wheel).Let d be the diameter of the small wheel (front wheel). According to the question information,D = 3/2 × d.
When the car travels 1 m, the big wheel makes 6 turns. Therefore, 6 × the circumference of the big wheel = 1Circumference of the big wheel is πD, therefore the equation can be presented as:6 × πD = 1….(Equation 1).
Let x be the number of turns the small wheel makes when the car travels 1m.Using the same logic, we can form the equation x × πd = 1…. (Equation 2)
Dividing Equation 1 by Equation 2:
6Dxd
= 1 6Dd
x = 6 × 3 2x = = 9 , make x the subject of the equation:
6Dxd
= 1 6Dd
x = 6 × 3 2x = = 9
Substitute D= 3/2 d
6Dxd
= 1 6Dd
x = 6 × 3 2x = = 9 .
Measurement Medium
5 B
If the number is to be divisible by 3 and by 4, it has to be divisible by 12. The first number that is divisible by 12 between 300 and 400 is 312. Then continue to add 12 to get the next number until you reach 396 (the last number before 400).Therefore, the numbers are 312, 324, 336, 348, 360, 372, 384, 396. There are 8 numbers.
Number and Arithmetic Medium/Hard
ICAS Mathematics Practice Questions Paper H © EAA
6 D
d 2V = π × h
d 2
V = π × 4 × × h
2d 2V = π × h 2d
2 V = π × hd 2V = π × h where d is the diameter, h is
the height of the bottle.Alan suggested doubling the height, therefore the new volume will be: d
2V = π × h
d 2
V = π × 4 × × h
2d 2V = π × h 2d
2 V = π × hd 2V = π × h.
This is twice the original volume. In other words, by doubling the height of the bottle it will hold twice as much content.Bill suggested doubling the diameter, therefore the new volume will be:
d 2V = π × h
d 2
V = π × 4 × × h
2d 2V = π × h 2d
2 V = π × hd 2V = π × h
.This is 4 times the original volume. In other words, the bottle then will hold 4 times as much content. Therefore, only Alan was correct.
Space and Geometry Hard
7 A
The green area is 2a × a = 2a2The orange area is 4a × a = 4a2The blue area is = length × width = (6b + 2b) × (6a − 4b)= 8b × (6a − 4b)= 48ab − 32b2Therefore the total area that is coloured is = green + orange + blue= 2a2 + 4a2 + 48ab − 32b2= 6a2 + 48ab − 32b2
Algebra and Pattern Hard
ICAS Mathematics Practice Questions Paper H © EAA
Level of difficulty refers to the expected level of difficulty for the question.
Easy more than 70% of candidates will choose the correct option
Medium about 50–70% of candidates will choose the correct option
Medium/Hard about 30–50% of candidates will choose the correct option
Hard less than 30% of candidates will choose the correct option
8 A
This question relies on looking for a pattern. 333444 = (3 × 111)444 = 3444 × 111444 Let’s look at powers of 111 and try to find a pattern:1111 = 1111112 = 123211113 = 1367631It is clear that the last digit of 111 to the powerof 444 is 1.For powers of 3 there is a different pattern:31 = 332 = 933 = 2734 = 8135 = 24336 = 72937 = 218738 = 6561From this pattern every 4th power of 3 results ina number with the digit 1 in the units place.Since 444 is a multiple of 4, then 3444 will end in 1. If we multiply this number by 111444
(which also ends with the digit 1), the result will also end with 1.
Number and Arithmetic Hard
9 990 990 is the lowest common multiple of 9, 10 and 11.
Number and Arithmetic Hard
10 89
Height of smallest doll is 40.5mm.Rate of increase in height of successive dolls is 12896
12896
700
.
Height of doll with 700 dolls inside
= 40.5 × 12896
12896
700
= 1.1603 × 1089 mmTherefore, the value of x is 89.
Number and Arithmetic Hard