Mathematics Past Questions

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2571

If 30% of y is equal to x, what in terms of x, is 30% of 3y?

A. \(\frac{x}{9}\)
B. \(\frac{x}{3}\)
C. x
D. 3x

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2572

A baker used 40% of a 50kg bag of flour. If \(\frac{1}{8}\) of the amount used was for the cake, how many kilogram of flour was used for the cake?

A. 2\(\frac{1}{2}\)
B. 6\(\frac{1}{2}\)
C. 15\(\frac{3}{8}\)
D. 17\(\frac{1}{2}\)

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2573

If tan y = 0.404, where y is acute, find cos 2y

A. 0.035
B. 0.719
C. 0.808
D. 0.927

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2574

The ratio of boys to girls in a class is 5:3. Find the probability of selecting at random, a girl from the class

A. \(\frac{1}{8}\)
B. \(\frac{1}{3}\)
C. \(\frac{3}{8}\)
D. \(\frac{3}{5}\)

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2575

\(\begin{array}{c|c} x & 1 & 4 & p \\ \hline y & 0.5 & 1 & 2.5\end{array}\). The table above satisfies the relation y = k\(\sqrt{x}\), where k is a positive constant. Find the value of K.

A. 0.5
B. 1
C. 1.5
D. 2

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