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PAST QUESTIONS 2004
Time yourself to improve on your speed. You are to use not more than 60 minutes for this section.
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Try the questions first, using not more than 15 minutes for each question, and watch the accompanying videos to see how the questions are solved.
Question 1
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\((i)\) Factorise completely the expression
\(2xy - 8x + 3y -12\)
\((ii)\) Evaluate the expression in \((i)\) if \(x = 5\) and \(y = 7\)
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Make \(q\) the subject of the equation
\(t = \frac{1}{p} + \frac{1}{q}\)
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Given that \(\mathbf{u} = \begin{pmatrix}-5 \\ 9 \end{pmatrix}\) and \(\mathbf{v} = \begin{pmatrix}8 \\ 12 \end{pmatrix}\), find \(3(\mathbf{u} + \frac{1}{2}\mathbf{v})\)
Solution
Solution
Solution
Question 2
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Ama and Kofi shared the profit earned from their business in the ratio \(3:4\). The profit was ₵1,743,000.
\((i)\) Find how much of the profit each person received.
\((ii)\) Kofi lent out his share of the profit at a rate of 20% per annum for 2 years. Find the interest on his share.
\((iii)\) What will be Kofi's total amount at the end of the 2 years?
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Change \(243_{five}\) into a base ten numeral.
Solution
Solution
Question 3
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Using a ruler and a pair of compasses only, construct,
\((i)\) triangle \(PQR\) such that \(|PQ| = 8\) cm, angle \(QPR = 60^\circ\) and angle \(PQR = 45^\circ\)
\((ii)\) Measure \(|QR|\).
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A rectangular water tank has length 60 cm, with width 45 cm and height 50 cm. Find,
\((i)\) the total surface area of the tank when closed,
\((ii)\) the volume of the tank,
\((iii)\) the height of the water in the tank, if the tank contains \(81,000\) cm\(^3\) of water.
Solution
Solution
Question 4
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A car runs on the average at 45 km to 5 litres of fuel. Calculate how many litres of fuel are required for a journey of 117 km.
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\((i)\) Solve for \(x\) in the inequality
\(\frac{2}{3}(2x + 5) \leq 8\frac{2}{3}\)
\((ii)\) Illustrate the solution on the number line.
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A factory increased its production by \(22\frac{1}{2}\%\) and produced 49,000 tonnes. How many tonnes was it producing before?
Solution
Solution
Solution
Question 5
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\((i)\) Using a scale of 2 cm to 1 unit on both axes, draw two perpendicular axes \(Ox\) and \(Oy\) on a graph sheet.
\((ii)\) On the same graph sheet, mark the \(x-\)axis from \(-5\) to \(5\) and \(y-\)axis from \(-6\) to \(6\).
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Plot the points
\((i)\) \(P(1, -2)\) and \(Q(4, 5)\)
\((ii)\) \(P^\prime\) the image of \(P\) under a translation by the vector \(\begin{pmatrix}-5 \\ 0 \end{pmatrix}\) and \(Q^\prime\), the image of \(Q\) by the same vector.
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\((i)\) Join \(PQQ^\prime P^\prime\)
\((ii)\) Measure angles \(PQQ^\prime\) and \(PP^\prime Q^\prime\).
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\((i)\) Find the vectors \(\overrightarrow{PQ}\) and \(\overrightarrow{P^\prime Q}\)
\((ii)\) What is the shape of \(PQQ^\prime P^\prime\)?
Solution
Question 6
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The following are the ages in years of members of a group:
\(8, 11, 8, 10, 6, 7, 3x, 11, 11\)If the mean age is 9 years, find
\((i)\) \(x\),
\((ii)\) the modal age
\((iii)\) the median age.
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Draw a bar chart for the distribution.
Solution
Solution
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