0580.C1.13.01 — deposit.: past paper questions

Real questions on 0580.c1.13.01 — deposit.

The newest 7 of 7 written questions. Open one to see it on the real paper.

1. 0980/42 · May/June 2025 · Q17a[3]
   17 (a) Alex invests $400atarateof$2.3\%$ per year simple interest. Find the total amount Alex has at the end of 5 years.See it on the paper →
2. 0980/42 · May/June 2025 · Q17b[3]
   (b) Virat has $100 to spend. In February he spends $x$ . In March he spends $10\%$ more than he spends in February. In April he spends $10\%$ more than he spends in March. At the end of April, Virat has $33.80 remaining. Find the value of $x$.See it on the paper →
3. 0980/42 · May/June 2025 · Q17c[4]
   (c) Bobbie invests $500 in an account that pays compound interest each year. At the end of 17 years, the value of Bobbie’s investment is $700.13. Find the value of Bobbie’s investment at the end of 20 years.See it on the paper →
4. 0980/41 · October/November 2022 · Q4a(i)[3]
   (a) (i) Zak invests $500atarateof$2\%$ per year simple interest. Calculate the value of Zak's investment at the end of 5 years.See it on the paper →
5. 0980/41 · October/November 2022 · Q4a(ii)[2]
   (ii) Yasmin invests $500atarateof$1.8\%$ per year compound interest. Calculate the value of Yasmín's investment at the end of 5 years.See it on the paper →
6. 0980/41 · October/November 2022 · Q4a(iii)[3]
   (iii) Zak and Yasmin continue with these investments. How many **more complete** years is it before the value of Yasmin's investment is greater than the value of Zak's investment?See it on the paper →
7. 0980/41 · October/November 2022 · Q4c[3]
   (c) The number of a certain type of bacteria increases exponentially at a rate of $r\%$ each day. After 22 days, the number of this bacteria has doubled. Find the value of $r$.See it on the paper →

What examiners said

This part was answered very well, with most candidates applying the simple interest formula correctly. Very occasionally, the interest of $46 was given as the final answer, rather than the total amount. A small number used compound interest in their calculations.

— Examiner report, May/June 2025, 0980/42 Q17(a) (Cambridge)

Candidates found this part very challenging. Some were able to identify that the amount spent in April was 1.1 the amount spent in March, which is (1.1)2 the amount spent in February. Those that understood this relationship usually set up a correct equation and solved it to find x = 20. Some candidates used a trial-and-error approach, starting with a trial amount for February and calculating corre...

— Examiner report, May/June 2025, 0980/42 Q17(b) (Cambridge)

Many candidates were successful in this question part. The most common error was to calculate the interest only and give a final answer of 50. Another common error was to calculate compound interest instead of simple interest.

— Examiner report, October/November 2022, 0980/41 Q4(a)(i) (Cambridge)