1999 年

In a class, students study either History or Geography, but not both. If the number of students studying Geography is $50\%$ more than those studying History, what is the percentage of students studying History?

If $x:y=3:4$ and $2x+5y=598$, find $x$.

If $1$ Australian dollar is equivalent to $4.69$ H.K. dollars and $100$ Japanese yen are equivalent to $5.35$ H.K. dollars, how many Japanese yen are equivalent to $1$ Australian dollar? Give your answer correct to the nearest Japanese yen.

Let $m$ be a positive integer. Which of the following must be true? I. $m^2$ is even. II. $m(m+1)$ is even. III. $m(m+2)$ is even.

In the figure, the bearing of $B$ from $C$ is

Which of the following may represent the graph of $y=\cos x^\circ$ for $0\le x\le 90$ ?

In the figure, find $x$ correct to 3 significant figures.

In the figure, $\dfrac{AC}{AB}=$

In the figure, find $x$ correct to 1 decimal place.

In the figure, $ABCD$ is a parallelogram. Find $\angle ABC$ correct to the nearest degree.