Mathematics Past Questions

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Past Questions

1,853 questions
Question 1 of 20 1,853 total questions
Question 681
waec 1998

Find (X-Y) if 4x - 3y = 7 and 3x - 2y = 5

A4
B3
C2
D-2
E-3
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Question 682
waec 1998

Find the equation whose roots are \(\frac{2}{3}and \frac{-1}{4}\)

A\(12x^2-5x+2=0\)
B\(12x^2-11x+2=0\)
C\(x^2-\frac{11}{12}x+2=0\)
D\(x^2+\frac{11}{12}x-2=0\)
E\(12x^2+11x+2=0\)
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Question 683
waec 1998

Make S the subject of the formula: \(V = \frac{K}{\sqrt{T-S}}\)

A\(T-\frac{K^2}{V^2} = S\)
B\(T+\frac{K^2}{V^2} = S\)
C\(T-\frac{K^2}{V} = S\)
D\(T-\frac{K}{V} = S\)
E\(T-\frac{K}{V^2} = S\)
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Question 684
waec 1998
For what value of x is the expression
x - 5/x2 - 2x - 3
not defined?
A3, 1
B-1, -3
C-1, 3
D3, -2
E1, -3
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Question 685
waec 1998
p and q are two positive numbers such that p > 2q. Which one of the following statements is not true?
A-p < -2q
B-p > -2q
C-q < 2p
Dq < 1/2p
Ep2 > 2q2
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Question 686
waec 1998
Solve the equation 5x2 - 4x - 1 = 0
A-1, 1/5
B-1, -1/5
C1, 1/5
D1, -1/5
E-1, 5
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Question 687
waec 1998

Simplify \(\frac{8^{\frac{2}{3}} \times 27^{\frac{-1}{3}}}{64^{\frac{1}{3}}}\)

A-3
B\(\frac{1}{9}\)
C\(\frac{1}{3}\)
D\(\frac{27}{8}\)
E4
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Question 688
waec 1998
A piece of cloth was measured as 6.10m. If the actual length of the cloth is 6.35, find the percentage error, correct to 2 decimal places
A3.05%
B3.95%
C15.00%
D25.00%
E39.30%
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Question 689
waec 1998
Find the number whose logarithm to base 10 is 2.6025
A0.0004
B4.004
C40.04
D400.4
E4004
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Question 690
waec 1998
The nth term of a sequence is represented by 3 x 2(2-n). Write down the first three terms of the sequence
A3/2, 3, 6
B6, 3, 3/2
C3/2, 3, 1/3
D2/3, 3, 8/3
E3/2, 0, 6
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Question 691
waec 1998

Convert 35 to a number in base two

A1011two
B10011two
C100011two
D110010two
E110001two
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Question 692
waec 1998

When an aeroplane is 800m above the ground, its angle of elevation from a point P on the ground is 30o. How far is the plane from P by line of sight?

A400m
B800m
C1500m
D1600m
E1700m
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Question 693
waec 1998

A student measured the length of a room and obtained the measurement of 3.99m. If the percentage error of is measurement was 5% and his own measurement was smaller than the length , what is the length of the room?

A3.78m
B3.80m
C4.18m
D4.20m
E4.788m
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Question 694
waec 1998

If log\(_{10}\) a = 4; what is a?

A0.4
B40
C400
D1000
E10000
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Question 695
waec 1998

Simplify 0.63954 ÷ 0.003 giving your answer correct to two significant figures

A213.18
B213.00
C213
D210
E21
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Question 696
waec 1998

Cos x is negative and sin x is negative.Which of the following is true of x?

A0o < x < 90o
B90o < x
C180o < x < 270o
D270o < x
E-90o < x
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Question 697
waec 1998

If log\(_{10}\) q = 2.7078, what is q?

A5102
B849.9
C510.2
D84.99
E51.02
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Question 698
waec 1998

What value of k makes the given expression a perfect square ? m\(^2\) - 8m + k = 0

A2
B4
C8
D16
E64
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Question 699
waec 1998

Find the root of the equation 2x\(^2\) - 3x - 2 = 0

Ax = -2 or 1/2
Bx = -2 or1
Cx = -2 or 2
Dx = -1 or 2
Ex = -1/2 or 2
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Question 700
waec 1997
A bag contains 3 white, 6 red, 5 blue identical balls. A ball is picked at random from bag. What is the probability that is either white or blue?
A9/14
B4/7
C3/7
D5/14
E3/14
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