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Revision Notes

Instalment Buying

NIOS · Class 10 · Maths

Quick revision notes for Instalment Buying — NIOS Class 10 Maths. Key concepts, formulas, and definitions for last-minute revision.

29 questions25 flashcards5 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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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 Instalment Buying Concept Map, Instalment Buying - Complete Concept Map, Instalment Buying Concepts Overview. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Instalment Buying — NIOS Class 10 Maths?
Understand the core concepts first, then work through the 29 practice questions available for this chapter. Revise formulas and 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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