💣 Q :97 Prep 1 Question Bank T1

1. Marine Creatures: A dolphin dived to a depth of \( 3 \frac{1}{4} \) meters underwater, then it dived a further \( 2 \frac{1}{2} \) meters. Which of the following does not express the dolphin's position relative to the water surface?

(a) \( -3 \frac{1}{4} + \left( -2 \frac{1}{2} \right) \)

(b) \( -3 \frac{1}{4} + \left| -2 \frac{1}{2} \right| \)

(c) \( -3 \frac{1}{4} - 2 \frac{1}{2} \)

(d) \( -\left( 3 \frac{1}{4} + 2 \frac{1}{2} \right) \)

The correct answer is (b) because it adds the absolute value (positive) of the second dive instead of subtracting it.

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2. Economy: If the stock price of a company listed on the Egyptian exchange increased by 3.25 LE, and then decreased by 2.75 LE, which of the following expresses the change in the stock price at that moment?

(a) \( -3.25 + 2.75 \)

(b) \( 3.25 - 2.75 \)

(c) \( 3.25 + 2.75 \)

(d) \( -3.25 - 2.75 \)

The correct answer is (b) because it correctly shows the net change (+3.25 LE - 2.75 LE).