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Formula Sheet

Playing With Numbers — Formula Sheet

ICSE · Class 8 · Mathematics

6 formulas from Playing With Numbers (ICSE Class 8 Mathematics) on one page, grouped by topic. Part of the ICSE Class 8 Mathematics syllabus.

36 questions34 flashcards6 formulas & key relations5 concepts

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6 Entries · 2 Sections

Formulas and Key Relations

Generalized Form and Place Values

3479 = 3 × 1000 + 4 × 100 + 7 × 10 + 9 × 1

abc = 100a + 10b + c

ab = 10a + b

Properties of Numbers and Digits

ab + ba = 11(a + b)

ab - ba = 9(a - b); ba - ab = 9(b - a)

abc + bca + cab = 111(a + b + c)

Full sheet with units and worked examples

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Frequently Asked Questions

What are the important topics in Playing With Numbers for ICSE Class 8 Mathematics?
Key topics in Playing With Numbers include Generalized Form and Place Value, Properties of Reversed Numbers and Cyclic Numbers, Cryptarithms, Divisibility Tests. Study these first, then practise questions on each for Class 8 exams.
How many formulas are in Playing With Numbers?
This sheet lists 6 formulas from Playing With Numbers, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Playing With Numbers for Class 8 exams?
Learn the core ideas first, then work through the 36 practice questions on Playing With Numbers. 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 Playing With Numbers

All ICSE Class 8 Mathematics Formula Sheet

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