Mathematics JAMB, WAEC, NECO AND NABTEB Official Past Questions

22

A trader bought 100 oranges at 5 for N40.00 and sold them at 20 for N120.00. Find the profit or loss percent

  • A. 20% profit
  • B. 20% loss
  • C. 25% profit
  • D. 25% loss
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23

The rate of consumption of petrol by a vehicle varies directly as the square of the distance covered. If 4 litres of petrol is consumed on a distance of 15km. how far would the vehicle go on 9 litres of petrol?

  • A. 22\(\frac{1}{2}\)km
  • B. 30km
  • C. 33\(\frac{1}{2}\)km
  • D. 45km
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24

A farmer uses \(\frac{2}{5}\) of his land to grow cassava, \(\frac{1}{3}\) of the remaining for yam and the rest for maize. Find the part of the land used for maize

  • A. \(\frac{2}{15}\)
  • B. \(\frac{2}{5}\)
  • C. \(\frac{2}{3}\)
  • D. \(\frac{4}{5}\)
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25

Simplify: \(\frac{3x – y}{xy} – \frac{2x + 3y}{2xy} + \frac{1}{2}\)

  • A. \(\frac{4x + 5y - xy}{2xy}\)
  • B. \(\frac{5y - 4x + xy}{2xy}\)
  • C. \(\frac{5x + 4y - xy}{2xy}\)
  • D. \(\frac{4x - 5y + xy}{2xy}\)
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26

The area of a rhombus is 110 cm\(^2\). If the diagonals are 20 cm and (2x + 1) cm long, find the value of x.

  • A. 5.0
  • B. 4.0
  • C. 3.0
  • D. 2.5
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27

Which of the following is used to determine the mode of a grouped data?

  • A. Bar chart
  • B. Frequency polygon
  • C. Ogive
  • D. Histogram
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28

Make K the subject of the relation T = \(\sqrt{\frac{TK – H}{K – H}}\)

  • A. K = \(\frac{H(T^2 - 1)}{T^2 - T}\)
  • B. K = \(\frac{HT}{(T - 1)^2}\)
  • C. K = \(\frac{H(T^2 + 1)}{T}\)
  • D. K = \(\frac{H(T - 1)}{T}\)
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29

In the given diagram, \(\bar{QT}\) and \(\bar{PR}\) are straight lines, < ROS = (3n – 20), < SOT = n, < POL = m and < QOL is a right angle. Find the value of n.

  • A. 35o
  • B. 40o
  • C. 55o
  • D. 60o
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30

If \(\frac{\sqrt{2} + \sqrt{3}}{\sqrt{3}}\) is simplified as m + n\(\sqrt{6}\), find the value of (m + n)

  • A. \(\frac{1}{3}\)
  • B. \(\frac{2}{3}\)
  • C. 1\(\frac{1}{3}\)
  • D. 1\(\frac{2}{3}\)
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31

Tom will be 25 years old in n years’ time. If he is 5 years younger than Bade, find Bade’s present age.

  • A. (30 - n)years
  • B. (20 - n)years
  • C. (25 - n)years
  • D. (30 + n)years
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32

In the diagram, VW//YZ, |WX| = 6cm, |XY| = 16cm, |YZ| = 20cm and |ZX| = 12cm. Calculate |VX|

  • A. 3cm
  • B. 4cm
  • C. 6cm
  • D. 8cm
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33

The probability that kebba, Ebou and Omar will hit a target are \(\frac{2}{3}\), \(\frac{3}{4}\) and \(\frac{4}{5}\) respectively. Find the probability that only Kebba will hit the target.

  • A. \(\frac{2}{5}\)
  • B. \(\frac{7}{60}\)
  • C. \(\frac{1}{30}\)
  • D. \(\frac{1}{60}\)
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34
Score 0 – 4 5 – 9 10 – 14
Frequency 2 1 2

The table shows the distribution of the scores of some students in a test. Calculate the mean scores.

  • A. 5.6
  • B. 6.2
  • C. 6.6
  • D. 7.0
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35

The scores of twenty students in a test are as follows: 44, 47, 48, 49, 50, 51, 52, 53, 53, 54, 58, 59, 60, 61, 63, 65, 67, 70, 73, 75. Find the third quartile.

  • A. 62
  • B. 63
  • C. 64
  • D. 65
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36

The population of students in a school is 810. If this is represented on a pie chart, calculate the sectoral angle for a class of 72 students

  • A. 32o
  • B. 45o
  • C. 60o
  • D. 75o
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37

The angle of elevation of an aircraft from a point K on the horizontal ground 30\(\alpha\). If the aircraft is 800m above the ground, how far is it from K?

  • A. 400.00m
  • B. 692.82m
  • C. 923.76m
  • D. 1,600.00m
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38

PQRS is square. If x is the midpoint of PQ, Calculate correct to the nearest degree, <SPX

  • A. 53o
  • B. 55o
  • C. 63o
  • D. 65o
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39

\(\begin{array}{c|c}
x & 0 & 1\frac{1}{4} & 2 & 4\\
\hline
y & 3 & 5\frac{1}{2} & &
\end{array}\)
The table given shows some values for a linear graph. Find the gradient of the line

  • A. 1
  • B. 2
  • C. 3
  • D. 4
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40

In the diagram, O is the centre, \(\bar{RT}\) is a diameter, < PQT = 33\(^o\) and < TOS =  76\(^o\). Using the diagram, find the size of angle PRS.

  • A. 76o
  • B. 71o
  • C. 38o
  • D. 33o
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41

In the diagram, O is the centre, \(\bar{RT}\) is a diameter, < PQT = 33\(^o\) and <TOS = 76\(^o\). Using the diagram, calculate the value of angle PTR.

  • A. 73o
  • B. 67o
  • C. 57o
  • D. 37o
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42

In the diagram, PQ//RT, QR//Su,

  • A. 134o
  • B. 132o
  • C. 96o
  • D. 48o
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