iGCSE Mathematics (0580) - C1.13 Percentages- Exam Style Questions Paper 1- New Syllabus
▶️ Answer/Explanation
Calculate the total interest earned over \(4\) years using the simple interest formula:
\(\text{Interest} = \text{Principal} \times \text{Rate} \times \text{Time}\)
\(\text{Interest} = 2000 \times \frac{5}{100} \times 4 = 400\).
To find the total value of the investment, add the interest to the original principal:
\(\text{Total Value} = 2000 + 400 = 2400\).
✅ Answer: \(\$2400\)
▶️ Answer/Explanation
Let’s find expressions for the ticket price on both days:
• Monday cost $= x$
• Tuesday cost $= x + 0.20x = 1.2x$ Now we create an equation based on the total amount Jack spent buying 4 Monday tickets and 5 Tuesday tickets: $$4(x) + 5(1.2x) = 270$$ $$4x + 6x = 270$$ $$10x = 270$$ $$x = \frac{270}{10} = 27$$
Answer: $x =$ 27