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Formula Sheet

Unitary Method

ICSE · Class 7 · Mathematics

All formulas from Unitary Method in ICSE Class 7 Mathematics. Key equations, constants, and identities for board exam preparation.

42 questions20 flashcards5 concepts

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12 Formulas · 4 Sections

Formulas

Core idea

one day's work = 1 / No. of days required to complete the work

number of days required to complete a work = 1 / One day work

Time required to do a certain work = Work to be done / Work done in unit time

Direct variation

value of required quantity = value of unit quantity × number of units

Arrow method cross ratio: (value on the head)/(value on the tail) for one arrow = (value on the head)/(value on the tail) for the other arrow

Inverse variation

value of required quantity = value from unit case adjusted inversely

Arrow method cross ratio: (value on the head)/(value on the tail) for one arrow = (value on the head)/(value on the tail) for the other arrow

Worked examples to remember

₹ x / ₹ 400 = 28 / 10 => x = 1,120

x / 45 = 0.6 / 0.75 => x = 36

4 × 5 = 20; 20 / 4 = 5

60 × 4 = 240; 240 / 3 = 80

2000 ÷ (8 / 15) = 3750; 3750 × (3 / 5) = 2250

Full sheet with units and worked examples

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Frequently Asked Questions

What are the important topics in Unitary Method for ICSE Class 7 Mathematics?
Unitary Method covers several key topics that are frequently asked in ICSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Unitary Method — ICSE Class 7 Mathematics?
Understand the core concepts first, then work through the 42 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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All 25 chapters — ICSE Class 7 Mathematics Formula Sheet

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