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Vidaara.orgClass 9 · Mathematics
CodeVID-M09-16-RSI-01
CI as Repeated Simple Interest - Assignment
Chapter: Compound Interest
Topic: Compound Interest as Repeated Simple Interest
Maximum Marks: 35
Time: 75 minutes
Name: ____________________ Roll No.: __________ Date: ____________

General Instructions

  • All questions are compulsory.
  • Section A carries 1 mark each, Section B 2 marks, Section C 3 marks and Section D 5 marks.
  • Show all working for Sections B, C and D. Only final answers are given at the end — for full solutions, raise your doubts with your teacher.
Section A — Multiple Choice Questions 5 × 1 = 5 marks
1.
For the first year, CI and SI are:
  • A.equal
  • B.unequal
  • C.zero
  • D.negative
2.
Under CI, the year-end amount becomes the next year's:
  • A.interest
  • B.principal
  • C.rate
  • D.time
3.
For more than one year, CI is ___ SI.
  • A.less than
  • B.equal to
  • C.greater than
  • D.half of
4.
SI on Rs $1000$ at $10\%$ for $1$ year:
  • A.Rs $10$
  • B.Rs $100$
  • C.Rs $110$
  • D.Rs $1000$
5.
CI is interest on the principal plus the accumulated:
  • A.tax
  • B.interest
  • C.rate
  • D.time
Section B — Short Answer (2 marks) 4 × 2 = 8 marks
6.
Find the SI on Rs $1000$ at $10\%$ for $1$ year.
7.
Under CI, what is the new principal after $1$ year on Rs $1000$ at $10\%$?
8.
Are CI and SI equal for the first year?
9.
Find the SI on Rs $2000$ at $5\%$ for $1$ year.
Section C — Short Answer (3 marks) 4 × 3 = 12 marks
10.
Find the CI on Rs $1000$ at $10\%$ for $2$ years (year-by-year).
11.
Find the CI on Rs $2000$ at $5\%$ for $2$ years (year-by-year).
12.
Find the difference between CI and SI on Rs $1000$ at $10\%$ for $2$ years.
13.
Find the amount on Rs $5000$ at $10\%$ for $1$ year (CI).
Section D — Long Answer (5 marks) 2 × 5 = 10 marks
14.
Find the compound interest on Rs $8000$ at $10\%$ per annum for $2$ years using the year-by-year method.
15.
Find the difference between the CI and SI on Rs $10000$ at $10\%$ per annum for $2$ years.

Answer Key

Section A — Multiple Choice Questions
  1. (A) equal
  2. (B) principal
  3. (C) greater than
  4. (B) Rs $100$
  5. (B) interest
Section B — Short Answer (2 marks)
  1. Rs $100$.
  2. Rs $1100$.
  3. Yes.
  4. Rs $100$.
Section C — Short Answer (3 marks)
  1. Rs $210$.
  2. Rs $205$.
  3. Rs $10$.
  4. Rs $5500$.
Section D — Long Answer (5 marks)
  1. Rs $1680$.
  2. Rs $100$.
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