中文（繁體）
中文（简体）
English
P6 Maths: Simple Interest (Paper 1 (basics))
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 1 (basics))
Paper 1 (basics): 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)
- FoundationPrincipal $1000 at 5% per year for 2 years. Find the simple interest.
- FoundationPrincipal $2000 at 3% per year for 1 year. Find the simple interest.
- FoundationPrincipal $500 at 4% per year for 3 years. Find the simple interest.
- IntermediatePrincipal $800 at 5% per year for 2 years. Find the amount.
- IntermediatePrincipal $1200 at 6% per year for 1 year. Find the simple interest.
- IntermediatePrincipal $4000 at 2.5% per year for 2 years. Find the simple interest.
- ChallengePrincipal $600 at 8% per year for 3 years. Find the simple interest.
- ChallengeThe simple interest is $90 on a principal of $600 at 5% per year. Find the time.
- ChallengeThe simple interest is $240 on $2000 at 4% per year. Find the time.
- Error redo(Error clinic) Ming worked out the interest on $1500 for 2 years at 6% as 1500 x 6 x 2 = 18000. What went wrong, and what is the correct answer?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | $100 | I = 1000 x 5 / 100 x 2 = 100. |
| 2 | $60 | I = 2000 x 0.03 x 1 = 60. |
| 3 | $60 | I = 500 x 0.04 x 3 = 60. |
| 4 | $880 | Interest is 80, so the amount is 800 + 80 = 880. |
| 5 | $72 | I = 1200 x 0.06 x 1 = 72. |
| 6 | $200 | 2.5% is 0.025, so 4000 x 0.025 x 2 = 200. |
| 7 | $144 | One year earns 48, so three years earn 48 x 3 = 144. |
| 8 | 3 years | T = 90 x 100 / (600 x 5) = 3. |
| 9 | 3 years | One year earns 80, and 240 / 80 = 3 years. |
| 10 | He forgot to divide 6 by 100; the correct interest is $180 | I = 1500 x 6 / 100 x 2 = 180. |
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 →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.
© TutorZone · www.tutorzone.com.hk · For personal study and teaching use only.