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Study Plan

Logarithms — Study Plan

ICSE · Class 9 · Mathematics

A step-by-step study plan for Logarithms, ICSE Class 9 Mathematics: what to learn first, what to practise and when to revise.

34 questions25 flashcards21 formulas & key relations5 concepts

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An infographic summarizing the three main laws of logarithms: product rule, quotient rule, and power rule, with examples.
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. Meaning of Logarithm, 2. Basic Values of Logarithms, 3. Laws of Logarithms.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 34 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Logarithms after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Logarithms and exponents are two forms of the same relation.
  • The base in a logarithm must not be 1.
  • log_a c = b means a^b = c.
  • log_x 1 = 0 for any positive base x.
  • log_x x = 1 for any positive base x.
  • These results come from x^0 = 1 and x^1 = x.
  • Exponential form uses powers.
  • Logarithmic form uses log notation.
  • Both forms represent the same number relation.

Common Mistakes to Avoid

log_a(m+n) = log_a m + log_a n

log_a(m-n) = log_a m - log_a n

(log_a m)/(log_a n) = log_a m - log_a n

Memory Tips

Logarithm as the exponent answer

Exponential and logarithmic forms are partners

A base cannot be 1

Logarithm of 1 is 0

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Frequently Asked Questions

What are the important topics in Logarithms for ICSE Class 9 Mathematics?
Key topics in Logarithms include Meaning of Logarithm, Basic Values of Logarithms, Laws of Logarithms, Common Logarithms and Change of Base. Study these first, then practise questions on each for Class 9 exams.
How should I revise Logarithms for Class 9 exams?
Learn the core ideas first, then work through the 34 practice questions on Logarithms. 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.

More resources for Logarithms

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