📘 Simple Interest & Compound Interest – CUET Notes Summary
Understanding Simple Interest (SI) and Compound Interest (CI) is important for the Quantitative Aptitude section of the CUET exam. These topics help you calculate how money grows over time when interest is applied. 💰
🔹 Simple Interest (SI)
Simple Interest is calculated only on the original principal amount throughout the entire time period.
📌 Formula:
SI = (P × R × T) / 100
- P = Principal amount 💵
- R = Rate of interest per year (%) 📊
- T = Time (in years) ⏳
📍 Total Amount Formula:
A = P + SI
💡 Example:
If ₹1000 is invested at 5% per year for 2 years,
SI = ₹100 → Total Amount = ₹1100.
🔹 Compound Interest (CI)
Compound Interest is calculated on the principal plus the interest already earned. This means interest keeps adding to the principal every period. 📈
📌 Formula:
A = P(1 + R/100)T
📍 Compound Interest:
CI = A − P
- A = Final Amount 💰
- P = Principal
- R = Rate of interest
- T = Time
💡 Example:
₹1000 at 10% for 2 years compounded yearly →
Amount = ₹1210 → CI = ₹210.
🔹 Key Differences (SI vs CI) ⚖️
| Feature | Simple Interest | Compound Interest |
|---|---|---|
| Interest Calculation | Only on principal | On principal + previous interest |
| Growth | Linear 📉 | Exponential 📈 |
| Used In | Short-term loans | Investments, banks |
🔹 CUET Preparation Tips 🎯
- Memorize SI and CI formulas carefully.
- Practice shortcut tricks for 2–3 year CI questions.
- Solve previous CUET aptitude questions for speed.
- Understand the difference between SI and CI problems.
📚 Mastering Simple Interest and Compound Interest will help you solve many CUET quantitative aptitude questions quickly and accurately.
Here are FAQs related to CUET and the General Test (GT) that you can use on a worksheet or study page.
1. What is CUET?
The Common University Entrance Test (CUET) is a national-level entrance exam conducted for admission to undergraduate programs in many central, state, and private universities across India.
2. What is the CUET General Test (GT)?
The CUET General Test is a section of the CUET exam that evaluates a student’s general aptitude, logical reasoning, quantitative ability, and general knowledge.
3. What topics are included in the CUET GT quantitative section?
The quantitative aptitude section of CUET GT usually includes topics such as percentages, ratios, averages, profit and loss, time and work, time and distance, and basic arithmetic calculations.
4. Is the General Test compulsory in CUET?
No, the General Test is not compulsory for all courses. It depends on the university and the program requirements. Some courses require it, while others only require language and domain subjects.
5. Why is the percentage topic important for CUET GT?
Percentage is a core arithmetic concept used in many aptitude questions. It also forms the basis for solving problems related to profit and loss, discounts, data interpretation, and ratios, which frequently appear in the CUET GT.
6. How can students prepare for the CUET General Test?
Students can prepare by studying basic concepts, solving practice worksheets, attempting mock tests, and regularly practicing aptitude questions related to the syllabus.
7. What type of questions appear in CUET GT?
CUET GT includes multiple-choice questions (MCQs) covering quantitative aptitude, logical reasoning, general awareness, and basic analytical skills.
8. How many questions are asked in the CUET General Test?
The number of questions may vary depending on the exam pattern, but students usually need to attempt a specific number of questions from a given set within a time limit.
9. Is there negative marking in CUET?
Yes, the Common University Entrance Test typically includes negative marking, where marks may be deducted for incorrect answers.
10. What is the best way to improve speed in CUET GT quantitative questions?
Regular practice, learning calculation shortcuts, and solving timed practice tests can help improve speed and accuracy.