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1998 - WAEC Mathematics Past Questions and Answers - page 1

1

Find the root of the equation 2x2 - 3x - 2 = 0

A
x = -2 or 1/2
B
x = -2 or1
C
x = -2 or 2
D
x = -1 or 2
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2

What value of k makes the given expression a perfect square ? m2 - 8m + k = 0

A
2
B
4
C
8
D
16
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3

If log10 q = 2.7078, what is q?

A
5102
B
849.9
C
510.2
D
84.99
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4

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

A
0o < x < 90o
B
90o < x <180o
C
180o < x < 270o
D
270o < x <360o
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5

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

A
213.18
B
213.00
C
213
D
210
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6

If log10 a = 4; what is a?

A
0.4
B
40
C
400
D
1000
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7

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?

A
3.78m
B
3.80m
C
4.18m
D
4.20m
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8

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?

A
400m
B
800m
C
1500m
D
1600m
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9

Convert 35 to a number in base two

A
1011two
B
10011two
C
100011two
D
110010two
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10

The nth term of a sequence is represented by 3 x 2(2-n). Write down the first three terms of the sequence

A
3/2, 3, 6
B
6, 3, 3/2
C
3/2, 3, 1/3
D
2/3, 3, 8/3
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