Mathematics Past Questions

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Past Questions

1,853 questions
Question 1 of 20 1,853 total questions
Question 641
waec 1999

Solve the inequality 2x + 3 < 5x

A\(x>1\)
B\(x
C\(x>\frac{3}{7}\)
D\(x>-1\)
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Question 642
waec 1999

A survey shows that 28% of all the men in a village wear size 9 shoes. What is the probability that a man selected at random in the village wears size 9 shoes?

A\(\frac{7}{25}\)
B\(\frac{41}{50}\)
C\(\frac{1}{2}\)
D1
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Question 643
waec 1999

The root of a quadratic equation in x, are -m and 2n. Find the equation

A\(x^2 + x(m - 2n)-2mn=0\)
B\(x^2 - x(m - 2n)-2mn=0\)
C\(x^2 - x(m - 2n)+2mn=0\)
D\(x^2 + x(m - 2n)+2mn=0\)
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Question 644
waec 1999

If \(x^2 +15x + 50 = ax^2 + bx + c = 0\). Which of the following statement is not true?

Ax = -5
Bx = 10
Cx + 10 = 0
Dbc = 750
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Question 645
waec 1999

Which of the following pairs of inequalities is represented on the number line?

A\(x
B\(x\ge -2 and x>1\)
C\(x\le -2 and x\ge1\)
D\(x< -2 and x>1\)
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Question 646
waec 1999

Amina had m mangoes. She ate 3 and shared the remainder equally with her brother Uche. Each had at least 10. Which of the following inequalities represents the statements above.

A\(\frac{m}{2}-3\le 10\)
B\(\frac{m}{2}-3\ge 10\)
C\(\frac{m-3}{2}\ge10\)
D\(\frac{m-3}{2}\le10\)
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Question 647
waec 1999

Water flows from a tap into cylindrical container at the rate 5πcm\(^3\) per second. If the radius of the container is 3cm, calculate the level of water in the container at the end of 9 seconds.

A2cm
B5cm
C8cm
D15cm
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Question 648
waec 1999

The height and base of a triangle are in ratio 1:3 respectively. If the area of the triangle is 216 cm\(^2\), find the length of the base.

A24cm
B36cm
C72cm
D144cm
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Question 649
waec 1999

A car travel at x km per hour for 1 hour and at y km per hour for 2 hours. Find its average speed

A\(\frac{2x + 2y}{3}kmh^{-1}\)
B\(\frac{x + y}{3}kmh^{-1}\)
C\(\frac{x + 2y}{3}kmh^{-1}\)
D\(\frac{2x + y}{3}kmh^{-1}\)
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Question 650
waec 1999

Two numbers 24\(_{x}\) and 31\(_y\) are equal in value when converted to base ten. Find the equation connecting x and y

A2x = 3(y - 1)
B4x - y = 1
C3y + 2x = 3
D3y = 2 (x + 3)
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Question 651
waec 1999
Simplify 3.72 x 0.025 and express your answer in the standard form
A\(9.3\times 10^3\)
B\(9.3\times 10^2\)
C\(9.3\times 10^{-2}\)
D\(9.3\times 10^{-3}\)
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Question 652
waec 1999

The height of a pyramid on square base is 15cm. If the volume is 80cm\(^3\), find the length of the side of the base

A3.3cm
B5.3cm
C4.0cm
D8.0cm
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Question 653
waec 1999

In the diagram, PQST and QRST are parallelograms. Calculate the area of the trapezium PRST.

A60cm2
B50cm2
C40cm2
D30cm2
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Question 654
waec 1999
A pole of length L leans against a vertical wall so that it makes an angle of 60o with the horizontal ground. If the top of the pole is 8m above the ground, calculate L.
A\(16\sqrt{3}m\)
B\(4\sqrt{3}m\)
C\(\frac{\sqrt{3}}{16}\)
D\(\frac{16\sqrt{3}}{3}\)
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Question 655
waec 1999

The diagram shows the position of three ships A, B and C at sea. B is due north of C such that |AB| = |BC| and the bearing of B from A = 040°. What is the bearing of A from C

A040o
B070o
C110o
D290o
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Question 656
waec 1999

From the diagram above. ABC is a triangle inscribed in a circle center O. ∠ACB = 40º and |AB| = x cm. Calculate the radius of the circle.

A\(\frac{x}{sin 40^o}\)
B\(\frac{x}{cos 40^o}\)
C\(\frac{x}{2 sin 40^o}\)
D\(\frac{x}{2 cos 40^o}\)
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Question 657
waec 1999

From the top of a cliff 20m high, a boat can be sighted at sea 75m from the foot of the cliff. Calculate the angle of depression of the boat from the top of the cliff

A14.9 o
B15.5 o
C74.5 o
D75.1 o
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Question 658
waec 1999

If \(tan x = \frac{1}{\sqrt{3}}\), find cos x - sin x such that \(0^o \leq x \leq 90^o\)

A\(\frac{\sqrt{3}+1}{2}\)
B\(\frac{2}{\sqrt{3}+1}\)
C\(\frac{\sqrt{3}-1}{2}\)
D\(\frac{2}{\sqrt{3}-1}\)
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Question 659
waec 1999

If y varies inversely as x\(^2\), how does x vary with y?

Ax varies inversely as y2
Bx varies inversely as √y
Cx varies directly as y2
Dx varies directly as y
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Question 660
waec 1999

Simplify \(\frac{4}{x+1}-\frac{3}{x-1}\)

A\(\frac{x+7}{x^2 - 1}\)
B\(\frac{x-7}{x^2 + 1}\)
C\(\frac{x-7}{x^2 - 1}\)
D\(\frac{x-11}{x^2 - 1}\)
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