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Revision Notes

Instalment Buying — Revision Notes

NIOS · Class 10 · Maths

Instalment Buying revision notes for NIOS Class 10 Maths: 4 topics in quick points. Part of the NIOS Class 10 Maths syllabus.

29 questions25 flashcards7 formulas & key relations5 concepts

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A diagram illustrating the relationship between Cash Price, Cash Down Payment, Instalments, and Interest in an instalment buying scheme. Show an item (e.g., a TV) being purchased.
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One of 6 illustrations for Instalment Buying in Super Tutor — alongside flashcards, concept maps and practice questions.

Key Topics to Revise

1

Core ideas and definitions

  • Cash price is the full amount paid at the time of purchase for outright buying.
  • Cash down payment is the partial amount paid at the beginning under an instalment plan.
  • Instalment is the amount paid at regular intervals toward the remaining price.
2

Simple interest method for monthly instalments

  • Use this method for short-term monthly instalment plans when the total time is less than a year.
  • First find the total amount paid under the instalment plan.
  • Then find the interest paid by subtracting the cash price.
3

Compound interest method for instalment buying

  • Use compound interest for annual instalments over long periods.
  • Use compound interest also for semi-annual or quarterly instalments, even if the total period is short.
  • For annual instalments, the present value of the kth instalment is x(100/(100+R))^k.
4

Important solved results to remember

  • Example 9.1: TV sold for ₹20000 cash or ₹6000 down + ₹16800 after six months gives 40% per annum rate.
  • Example 9.2: Table fan rate of interest is approximately 33.8% per annum.
  • Example 9.3: Microwave oven rate of interest is approximately 44.4% per annum.

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Full Notes

Key Concepts

Cash price is the full amountCash down payment is the partAn instalment is a regular paymentThis is the extra amount chargedSimple interest is used for short

Frequently Asked Questions

What are the important topics in Instalment Buying for NIOS Class 10 Maths?
Key topics in Instalment Buying include Core ideas and definitions, Simple interest method for monthly instalments, Compound interest method for instalment buying, Important solved results to remember. Study these first, then practise questions on each for the NIOS Class 10 board exam.
How should I revise Instalment Buying for the NIOS Class 10 board exam?
Learn the core ideas first, then work through the 29 practice questions on Instalment Buying. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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