Mathematics Past Questions

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2781

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. \(\frac{2}{3}\)

View Answer & Discuss (5) WAEC 2010

2782

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

View Answer & Discuss WAEC 2010

2783

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

View Answer & Discuss (5) WAEC 2010

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2784

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. \(\frac{5}{16}\)

View Answer & Discuss WAEC 2010

2785

In the diagram, < PSR = 220^o, < SPQ = 58^o and < PQR = 41^o. Calculate the obtuse angle QRS.

A. 90^o
B. 100^o
C. 121^o
D. 60^o

View Answer & Discuss WAEC 2010

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