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Practice Quiz

Finding the Unknown — Practice Quiz

CBSE · Class 7 · Mathematics

Try a 4-question quiz on Finding the Unknown for CBSE Class 7 Mathematics: tap an answer to check it and see why. 73 questions in the full chapter test.

73 questions66 flashcards8 formulas & key relations5 concepts

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Quick Quiz: Finding the Unknown

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Tap an answer to check it instantly. No sign-up needed for these 4.

1

A matchstick pattern has the nth position given by 2n + 1 matchsticks. How many matchsticks are there at position 49?

2

Ranjana’s tile arrangement has 3k + 1 tiles at Step k. If an arrangement uses 100 tiles, which step number is it?

3

Jahnavi starts with ₹4000 and saves ₹650 per month. Sunita starts with ₹5050 and saves ₹500 per month. After how many months will their savings be equal?

4

Madhubanti has ₹500 to spend. Snacks cost ₹25 per plate and delivery costs ₹50. If p is the total number of people, which number of people can be served?

73 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
3 marks

Akash’s final answer in Riyaz’s math trick was 24. After the steps think of a number, subtract 3, multiply by 4, and add 8, what was the starting number?

Show answer

7

Let the number be x. The steps give 4x - 4 = 24. Add 4 to both sides: 4x = 28. Divide by 4: x = 7. So, Akash thought of 7.

2multiple choice
3 marks

Ramesh and Suresh have 60 marbles between them, and Ramesh has 30 more marbles than Suresh. How many marbles does Ramesh have?

Show answer

45

Let Suresh have y marbles. Then Ramesh has y + 30 marbles. So, y + (y + 30) = 60. This gives 2y + 30 = 60. Subtract 30: 2y = 30. Divide by 2: y = 15. Ramesh has 15 + 30 = 45 marbles.

3multiple choice
3 marks

Bhāskarāchārya’s horse problem gives the equation 300 + 6x = 10x - 100. What is the price of one horse?

Show answer

₹100

Start with 300 + 6x = 10x - 100. Step 1: Add 100 to both sides: 400 + 6x = 10x. Step 2: Subtract 6x from both sides: 400 = 4x. Step 3: Divide by 4: x = 100. So, one horse costs ₹100.

4multiple choice
3 marks

Solve the equation 11y + (-5) = 61 and find the value of y.

Show answer

6

Start with 11y + (-5) = 61. Add 5 to both sides: 11y = 66. Divide by 11: y = 6. So, the value of y is 6.

+69 more questions on Finding the Unknown (CBSE Class 7 Mathematics)

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Frequently Asked Questions

What are the important topics in Finding the Unknown for CBSE Class 7 Mathematics?
Key topics in Finding the Unknown include Unknowns, Equations, and Balance, Patterns and Formulas, Word Problems with One Unknown, Two Unknowns and Simultaneous Thinking. Study these first, then practise questions on each for Class 7 exams.
How many practice questions are there for Finding the Unknown?
There are 73 questions on Finding the Unknown. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

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

More resources for Finding the Unknown

All CBSE Class 7 Mathematics Practice Quiz

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