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P6 Maths: Simple Interest (Paper 2 (intermediate))
Tutor Prep Guide · The simple-interest formula I = P x R x T, substituting principal and annual rate, converting months to years, finding P, R or T from the interest, and the amount A = P + I
P6 Maths: Simple Interest (Paper 2 (intermediate))
Paper 2 (intermediate): ten simple-interest questions with answers and one-line notes.
Direct answers Level: P6 maths; format: the simple-interest formula, months as years, finding P or R, and the amount.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P6 Maths: Simple Interest |
| Level | P6 |
02 Questions (10 items)
- FoundationThe simple interest is $150 at 5% per year for 2 years. Find the principal.
- FoundationThe simple interest is $96 on $800 for 3 years. Find the annual rate.
- FoundationPrincipal $2400 at 5% per year for 6 months. Find the simple interest.
- IntermediatePrincipal $3600 at 4% per year for 9 months. Find the simple interest.
- IntermediateA principal of $1200 grows to $1260 in 1 year. Find the annual rate.
- IntermediatePrincipal $5000 at 3% per year for 2 years. Find the amount.
- ChallengeThe simple interest is $350 on $2500 at 7% per year. Find the time.
- ChallengePrincipal $1500 at 4% per year for 2 years. Find the average interest per month.
- ChallengePrincipal $8000 at 2.5% per year for 4 years. Find the amount.
- Error redo(Error clinic) Mei used 6 as the time for $3000 at 5% for 6 months and got 900. What is the correct interest?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | $1500 | P = 150 x 100 / (5 x 2) = 1500. |
| 2 | 4% | R = 96 x 100 / (800 x 3) = 4, i.e. 4%. |
| 3 | $60 | 6 months is 0.5 year, so 2400 x 0.05 x 0.5 = 60. |
| 4 | $108 | 9 months is 0.75 year, so 3600 x 0.04 x 0.75 = 108. |
| 5 | 5% | Interest is 1260 – 1200 = 60, so R = 60 / 1200 = 0.05. |
| 6 | $5300 | Interest is 300, so the amount is 5000 + 300 = 5300. |
| 7 | 2 years | T = 350 x 100 / (2500 x 7) = 2. |
| 8 | $5 per month | Two years earn 120, and 120 / 24 = 5 per month. |
| 9 | $8800 | Interest is 8000 x 0.025 x 4 = 800, so the amount is 8800. |
| 10 | The correct interest is $75; 6 months must be written as 0.5 year | 3000 x 0.05 x 0.5 = 75. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Check the answers, copy the working of any wrong item, then try another paper of this chapter.Tutor Registration →
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