2010 - WAEC Mathematics Past Questions and Answers - page 4
31
If x2 + kx + \(\frac{16}{9}\) is a perfect square, find the value of k
A
\(\frac{8}{3}\)
B
\(\frac{7}{3}\)
C
\(\frac{5}{3}\)
D
\(\frac{2}{3}\)
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32
If x km/h = y m/s, then y =
A
\(\frac{7}{18}\)x
B
\(\frac{11}{20}\)x
C
\(\frac{4}{15}\)x
D
\(\frac{5}{18}\)x
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33
The mean of the numbers 2, 5, 2x and 7 is less than or equal to 5. Find the range of the values of x
A
x \(\leq\) 3
B
x \(\geq\) 3
C
x < 3
D
x > 3
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34
In an athletic composition, the probability that an athlete wins a 100m race is \(\frac{1}{8}\) and the probability that he wins in high jump is \(\frac{1}{4}\). What is the probability that he wins only one of the events?
A
\(\frac{3}{32}\)
B
\(\frac{7}{3}\)
C
\(\frac{5}{3}\)
D
\(\frac{5}{16}\)
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35
In the diagram, < PSR = 220o, < SPQ = 58o and < PQR = 41o. Calculate the obtuse angle QRS.
A
90o
B
100o
C
121o
D
60o
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36
The bar chart shows the marks distribution in am English test. If 50% is the pass mark, how many students passed the test?
A
100
B
85
C
80
D
70
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37
The bar chart shows the marks distribution in am English test. What percentage of the students had marks ranging from 35 to 50?
A
55\(\frac{1}{3}\)%
B
60%
C
65%
D
66\(\frac{2}{3}\)%
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38
What is the value of m in the diagram?
A
20o
B
30o
C
40o
D
50o
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39
In the diagram, QR//ST, /PQ/ = /PR/ and < PST = 75o. Find the value of y
A
105o
B
110o
C
130o
D
150o
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40
In the diagram, triangles HKL and HIJ are similar. Which of the following ratios is equal to \(\frac{LH}{JH}\)
A
\(\frac{KL}{JI}\)
B
\(\frac{HK}{JK}\)
C
\(\frac{JI}{KL}\)
D
\(\frac{HK}{LK}\)
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