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Important Questions

Finding Common Ground — Important Questions

CBSE · Class 7 · Mathematics

54 important questions from Finding Common Ground for CBSE Class 7 Mathematics, with answers. Part of the CBSE Class 7 Mathematics syllabus.

54 questions70 flashcards9 formulas & key relations5 concepts

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54 Questions·
multiple choicemultiple correcttrue false

Important Questions from Finding Common Ground

1multiple choice
3 marks

Find the HCF of 96 and 275 using prime factorisation.

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1

Step 1: Factorise 96 = 2 × 2 × 2 × 2 × 2 × 3. Step 2: Factorise 275 = 5 × 5 × 11. Step 3: There are no common prime factors. Step 4: When there is no common prime factor, the HCF is 1.

2multiple choice
3 marks

Find the LCM of 96 and 360 using prime factorisation.

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1440

Step 1: 96 = 2 × 2 × 2 × 2 × 2 × 3. Step 2: 360 = 2 × 2 × 2 × 3 × 3 × 5. Step 3: Take every prime factor with the maximum number of occurrences. Step 4: LCM = 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 = 1440.

3multiple choice
3 marks

Find the HCF of 30 and 72 from their prime factorisations 30 = 2 × 3 × 5 and 72 = 2 × 2 × 2 × 3 × 3.

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6

Step 1: Common primes are 2 and 3. Step 2: Take the minimum count of each common prime. Step 3: HCF = 2 × 3 = 6.

4multiple choice
3 marks

Find the HCF of 225 and 750 using prime factorisation.

Show answer

75

Step 1: 225 = 3 × 3 × 5 × 5. Step 2: 750 = 2 × 3 × 5 × 5 × 5. Step 3: Common primes are 3, 5, and 5. Step 4: HCF = 3 × 5 × 5 = 75.

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Frequently Asked Questions

What are the important topics in Finding Common Ground for CBSE Class 7 Mathematics?
Key topics in Finding Common Ground include HCF: Highest Common Factor, Prime Factorisation and the Division Method, LCM: Lowest Common Multiple, Patterns, General Statements, and Special Properties. Study these first, then practise questions on each for Class 7 exams.
How many important questions are there in Finding Common Ground?
Super Tutor has 54 practice questions for Finding Common Ground, including multiple choice, multiple correct, true false questions. A sample with answers is on this page.

Sources & Official References

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

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All CBSE Class 7 Mathematics Important Questions

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