Class 8 Maths Exercise 8.4 | Question 1 to 13 Solutions In English | Chapter 8 | SCERT Assam

Class 8 Mathematics – Chapter 8: Comparing Quantities (পৰিমানৰ তুলনা) – Exercise 8.4 Solutions

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👉    • Class 8 Maths Exercise 8.3 | Question 1 to...  

🔹 Complete Playlist of Chapter 8 –
👉    • CLASS 8 MATHS CHAPTER 8 (Ex 8.1 to Ex 8.5)  

Welcome to Ospin Academy, students!

I’m Nasir, your mathematics teacher, and in this video, we will solve Exercise 8.4 of Chapter 8 – Comparing Quantities (পৰিমানৰ তুলনা) from the Class 8 SCERT Mathematics textbook.

This exercise focuses on advanced Compound Interest problems including quarterly, half-yearly compounding, finding principal, finding rate of interest, and difference between SI & CI. I will explain each question step-by-step with easy formulas, shortcuts, and exam-focused tricks.

Whether you’re in Assamese or English medium, this video will give you complete clarity on Compound Interest applications.


🧠 What’s Covered in This Video:

✔️ Advanced Compound Interest problems
✔️ Compounding annually, half-yearly, and quarterly
✔️ Finding Principal from Amount
✔️ Finding Rate from Amount
✔️ Difference between SI and CI
✔️ Full solutions of all Exercise 8.4 questions
✔️ Easy methods and shortcuts for exam preparation


📘 Exercise 8.4 – Questions Covered:

1. ₹ 300 for 2 years at 3% per annum


2. ₹ 4,000 for 3 years at 2% per annum


3. ₹ 10,000 for 2 years at 4% per annum


4. ₹ 7,000 for 3 years at 3% per annum


5. ₹ 1,500 for 2 years at 10% per annum


6. ₹ 900 for 3 years at 5% per annum


7. Find the compound interest on ₹ 1000 for 9 months at 4% per annum compounded quarterly.


8. Find the compound interest on ₹ 2000 for 1½ years at 4% per annum compounded half-yearly.


9. What principal will amount to ₹ 4500 in 2 years at 4% per annum compounded annually?


10. At what rate of compound interest ₹ 576 will amount to ₹ 625 in 2 years?


11. At what rate of compound interest ₹ 64 will amount to ₹ 125 in 3 years?


12. Find the difference of compound interest and simple interest on a sum of ₹ 500 at the rate of 10% per annum for 2 years.


13. Find the sum on which the difference of compound interest and simple interest will ₹ 1 after 2 years at the rate of 4% per annum.


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⏱ Timestamps

0:00 – Welcome & Introduction
1:00 – Concept of Compound Interest (Advanced)
2:40 – Formula Explanation (Quarterly & Half-Yearly)
4:00 – Q1 Solution
5:00 – Q2 Solution
6:00 – Q3 Solution
7:00 – Q4 Solution
8:00 – Q5 Solution
9:00 – Q6 Solution
10:00 – Q7 Solution
12:00 – Q8 Solution
14:00 – Q9 Solution
21:00 – Q10 Solution
28:00 – Q11 Solution
33:00 – Q12 Solution
42:00 – Q13 Solution

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📦 Chapter QR Codes

QR Code 1: P8L2D4
QR Code 2: K7Q9R6

🎉 Let’s master Advanced Compound Interest problems with smart examples – only on Ospin Academy with your teacher Nasir.
Happy Learning! 📚