Grade 10 MATHEMATICS PRACTICE TEST ONE 1.. Find the sum of the squares of the two numbers by answering the following questions.. 1 3.3 Substitute the information given above into your
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Grade 10 MATHEMATICS PRACTICE TEST ONE
1 Fred reads at 300 words per minute The book he is reading has an average of 450
words per page
3 The sum of two numbers is 5 Their product is 3 Find the sum of the squares of the two
numbers by answering the following questions
3.2 If the two numbers mentioned above are x and y, then write down the equations for the
sum and the product of the two numbers (1)
3.3 Substitute the information given above into your answer for 3.1 and hence determine
the sum of the squares of the two numbers (Hint: make sure to include both sides of
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7 Study the graph below and answer the questions that follow
a) f (x) is not symmetrical about any line
b) f (x) is symmetrical about the x-axis
c) f (x) is symmetrical about the y-axis
2 1
;;
1
?;;
;;
pq q
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Grade 10 MATHEMATICS PRACTICE TEST TWO
f and g ( x ) x2 4
2.1 Sketch f(x )and g(x)on the same set of axes Label all intercepts with the axes,
2.2 There is one value that g (x) can take on that f (x) cannot Write down this value (1)
3 Refer to the graph below and answer the questions that follow The functions drawn
x x
f( ) 6 and g(x) x2
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5.1 Below are pairs of parallelograms If you are only given information about their
diagonals, in which pair(s) can you distinguish between the two parallelograms?
a) a rhombus and a rectangle
b) a square and a rhombus
c) a kite and a trapezium
5.2 Match each definition with the correct figure If a definition applies to more than one
figure, then choose the figure that it describes the best You may only use each
definition once (Write the number of the figure and the letter of the definition – you do
not have to rewrite the whole definition.)
Figure Definition
(i) square A a quadrilateral with diagonals that bisect at 90q
(ii) rhombus B a quadrilateral with one pair of parallel sides
(iii) kite C a quadrilateral with a 90q corner angle and four equal sides (iv) trapezium D a quadrilateral with equal adjacent sides
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6 For each of the following, determine whether the statement is true or false If false,
correct the statement
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Grade 10 MATHEMATICS PRACTICE TEST THREE
1 Which of the following accounts would the best investment? Assume that you have
R1 000 to invest for 3 years
a) Zebra Bank offers 8% per annum compounded monthly
b) Giraffe Savings offers 8,2% per annum compounded yearly
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3 Use the diagram below to answer the questions that follow
3.1 Write down an expression for:
4 Sometimes statistics can be misleading Use your understanding of statistics to answer
the following questions
4.1 A car salesperson says, “I sold five cars last week That’s an average of one car every
day That means that I’m going to sell 20 cars this month.” Do you agree with his logic?
4.2 A study was done to see if a new skin cream could make wrinkles disappear It was
tested on six women while they were visiting a health spa and over 80 % reported that
their skin felt smoother Do you think the results of this study are reliable? Give at least
4.3 The average life expectancy in a certain country is around 70 years Does that mean
5 Determine whether each of the following statements is true or false If the statement is
false, explain or give a counter example to prove that the statement is false
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Grade 10 MATHEMATICS PRACTICE TEST FOUR
2 Bernard inherited a flat in England that belonged to his grandmother He decided to sell
it and use the money to buy a house in South Africa Below are the exchange rates at
the time of the sale:
2.3 Refer to the table of cross rates Describe the mathematical relationship between the
3 The diagram below shows squares of increasing sizes With each extra layer of small
squares we add, we build a bigger square
In the second layer, we add 3 small squares In the third layer, we add 5 small squares
3.1 How many tiles will there be in total if we have n layers of small squares? (2)
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area to find the value of the following sum to 8 000 terms:
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5 Your friend Nandi is working on a homework exercise She is getting very frustrated
because her answers do not seem to make any sense In the two triangles below, she
is trying to solve for x Explain why her answers do not make sense in each case
6 Your favourite soccer team is changing its kit The new kit will be a striped shirt and
plain shorts The team colours are blue and white The stripes and the background
colour of the shirt must be different (i.e white with blue stripes or blue with white
7 For two events, A and B, the probability of both occurring is 0,2 and the probability of
neither occurring is 0,1
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Grade 10 MATHEMATICS PRACTICE TEST ONE MEMORANDUM
Pages per hour =
450
000 18
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If the turning point is a minimum, then the parabola must be U shaped This means
that the coefficient of x2 must be positive There is no restriction on the value of b
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The hyperbola has been shifted up by 2 units because y = 2 is now its asymptote
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Grade 10 MATHEMATICS PRACTICE TEST THREE MEMORANDUM
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41
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average and apply that to a given week it might be more reliable, but to use a single
week’s average to try to predict future performance is not wise In the short run
almost anything can happen – one could have a good or bad week It does not
make sense to base statistics on a few short-term observations 9
(3)
No, 9 the results are not completely reliable Firstly, testing the product while the
women are at a spa is misleading The results of the spa treatment can not easily be separated from the results of the face cream 99 Secondly, there are too few
people in the test group to make any deductions 99 What seems true for six
people may not apply on a larger scale The women might also have responded
positively for emotional and psychological reasons
(5)
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Grade 10 MATHEMATICS PRACTICE TEST FOUR MEMORANDUM
Bernard would want a weak Rand relative to the Pound 9 This would mean that he
would receive more Rands for each Pound that he earned on the sale 9
(2)
2.3 An inverse or reciprocal relationship (9) exists between the two rates Mathematically:
46,14
1
0692,0
1
(9) (either description will earn 1 mark) (1)
Trang 28With each layer we add on, we make a bigger square This means that the sum of n
layers (odd numbers) is n2 This tells us that the sum of n odd numbers is n2
This is almost the same as the sequence in 3.4, except each term is 1 larger This
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21
;;
2
34
)5(3
)3(1
mBD u mAC z –1, so diagonals are not perpendicular Parallelogram ABCD is
therefore not a rhombus 9
(3)
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4.4 mAD =
)3(1
)3(3
)5(3
The longest side in a right-angled triangle is always the hypotenuse 9 In this triangle,
the hypotenuse is not the longest side, which is impossible 9 If we try to solve for x
using Pythagoras, we will not be able to find a solution because the triangle does not make sense
In this triangle, the sum of the angles is not 180q 9 (29q + 63q + 90q = 182q) This
triangle also does not make sense 9 If we try to use trig ratios to solve for x, we will
get a slightly different answer depending on which angle we use 9 This is because a right-angled triangle can not have a 29q angle and a 63q angle – these angles would belong to different triangles, hence the two different answers
(5)
Blue shirt, white stripes;; blue shorts
Blue shirt, white stripes;; white shorts
White shirt, blue stripes;; blue shorts
White shirt, blue stripes, white shorts 99
(2)