YEAR SEVEN Mathex 2008 Team

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					YEAR EIGHT Mathex 2009                            Team

Question 1

How many triangles are there in this figure?




Answer        _____________



YEAR EIGHT Mathex 2009                           Team

Question 2




                        Three fractions add together to give one fifth.

If all the question marks represent the same number, what is that number?



Answer___________________




YEAR EIGHT Mathex 2009                            Team

Question 3

Your dad tells you that he will pay you $6.00 an hour for the 6 seconds that you take to wash
your hands before dinner.

How much were you paid for washing your hands?




Answer ___________________
YEAR EIGHT Mathex 2009               Team

Question 4

There are 100 buildings along a street. A sign maker is ordered to number the buildings from
1 to 100.

How many 9’s will he use?




Answer ___________________



YEAR EIGHT Mathex 2009                            Team

Question 5

The ages of a father and son add up to 55. The father’s age is the son’s age reversed.

How old is the father?




Answer: Dad’s age is _______________________



YEAR EIGHT Mathex 2009                            Team

Question 6

What is the maximum number of boxes of the size of Box B that Box X will hold?


                         4 cm
        Box B
                     5 cm                                                                15 cm
        6 cm
                                                     Box X


                                                                                   12 cm
Answer ___________________
                                                      28 cm
YEAR EIGHT Mathex 2009                              Team

Question 7

James is sitting between John and Peter. Phillip is sitting on Peter’s right.

Between whom is Peter sitting?




Answer ___________________




YEAR EIGHT Mathex 2009                              Team

Question 8

4 zacs are worth 3 euros and 4 euros are worth 3 royals. If 1 royal costs $12, calculate the
price (in dollars) of 2 euros.




Answer ___________________




YEAR EIGHT Mathex 2009                              Team

Question 9

Estimate this acute angle to within 5   of accuracy.




Answer_____________________
YEAR EIGHT Mathex 2009                               Team

Question 10        Given that:

                    +                +           +             =             +
                     -               =    5
                                     =    2
                    +                +           =     18

Find the value of the shape      .


Answer            = ______________


YEAR EIGHT Mathex 2009                               Team

Question 11

Write the time this clock shows in 24 hour time.

               End of the movies




Answer        _______________



YEAR EIGHT Mathex 2009                               Team

Question 12

If the shaded square is 1 square unit, what is the area of the largest square?




Answer ___________________
YEAR EIGHT Mathex 2009                               Team

Question 13

A wire 48 cm long is bent to make a rectangle with the sides in the ratio of 3:5. What is the
width of the rectangle?




Answer ___________________




YEAR EIGHT Mathex 2009                               Team

Question 14

How much time is saved by driving 10 km at 120 km per hour instead of 100 km per hour?




Answer ___________________




YEAR EIGHT Mathex 2009                               Team

Question 15

After a journey I have only a third of the petrol that I started with. At the petrol station I add
10L and now have 19L.

How many litres of petrol did I have to start with?




Answer ___________________
YEAR EIGHT Mathex 2009                            Team

Question 16

How many squares in this diagram below?




Answer ___________________


YEAR EIGHT Mathex 2009                            Team

Question 17

A number of students are standing in a circle. They are evenly spaced, and the fourth student
is directly opposite the 14th student. How many students are there altogether?




Answer ___________________




YEAR EIGHT Mathex 2009                            Team

Question 18

Use the digits 1, 3, 5, 7 (once each) so the completed multiplication below gives the largest
possible answer.

Answer
YEAR EIGHT Mathex 2009                             Team

Question 19

A pattern of triangles is made from toothpicks, as shown below.




If 87 toothpicks are used, how many triangles have been formed?



Answer ___________________



YEAR EIGHT Mathex 2009                             Team

Question 20

Each letter stands for a different digit. What does ABBBC represent?

                  AAAA
                  BBBB
                + CCCC
                A BBBC



Answer ___________________




YEAR EIGHT Mathex 2009                             Team

Tie Breaker 1

Make each statement true by placing a single digit in all the circles. Each of the digits from 1
to 9 must be used once only.



                x                      = 20

                x                      = 20

                x                      = 20
YEAR EIGHT Mathex 2009                           Team

Tie Breaker 2

The excavator at the mine uses 1L of fuel every 3 minutes. The truck uses 1L of fuel every 6
minutes.

How long will 100L of fuel last if both machines are being used?




Answer ___________________
                                    YEAR EIGHT ANSWERS


Tie Breaker 2        200 minutes ( unit required)

Tie Breaker 1         9     x       3   -      7
                      6     x       2   +      8
                      4     x       5          1

20    19998

19    43

18.              7   1
             x   5   3
             2   1   3
           3 5   5   0
           3 7   6   3

17    20

16    30

15    21 (L)

14    1 minute (unit required)

13.   9 (cm)

12.   32 (square units)

11.   2230

10.         =3

9.

8.    18

7.    James and Phillip

6.    42

5.    Dad’s age = 32 or 41 (Only 1 answer required)

4.    20

3.    1 cent or $0.01


2.    15

1.    8

				
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