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Important Questions

Algebra Play

CBSE · Class 8 · Mathematics

Most important questions from Algebra Play for CBSE Class 8 Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.

59 questions68 flashcards5 concepts

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59 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
3 marks

The sum of the numbers in a 2x2 calendar grid is 52. What is the top-left number?

Show answer

9

For a 2x2 calendar grid, the sum is 4a + 16. Set 4a + 16 = 52. Then 4a = 36, so a = 9. The top-left number is 9.

2multiple choice
3 marks

In a number pyramid, the top is 90 and the bottom row is 14, c, and 10, with the middle row values a and b. Find c, a, and b.

Show answer

c = 33, a = 47, b = 43

In a number pyramid, each number is the sum of the two numbers below it. So a = 14 + c, b = c + 10, and a + b = 90. Substitute: (14 + c) + (c + 10) = 90. That gives 24 + 2c = 90, so 2c = 66 and c = 33. Then a = 14 + 33 = 47 and b = 33 + 10 = 43.

3multiple choice
3 marks

For the number pyramid with top 60 and bottom row 12, c, 8, what are the values of c, a, and b?

Show answer

c = 20, a = 32, b = 28

The pyramid rules give a = 12 + c, b = c + 8, and a + b = 60. So (12 + c) + (c + 8) = 60. This becomes 20 + 2c = 60. Then 2c = 40, so c = 20. After that, a = 12 + 20 = 32 and b = 20 + 8 = 28.

4multiple choice
3 marks

A 2-digit number is written as ab. If the number is reversed to ba and b > a, what is the difference between the reversed number and the original number?

Show answer

9(b - a)

The original number is 10a + b and the reversed number is 10b + a. Their difference is (10b + a) - (10a + b) = 9b - 9a = 9(b - a). So it is always divisible by 9.

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Frequently Asked Questions

What are the important topics in Algebra Play for CBSE Class 8 Mathematics?
Algebra Play covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Algebra Play — CBSE Class 8 Mathematics?
Understand the core concepts first, then work through the 59 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Algebra Play?
There are 59 practice questions available for Algebra Play. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

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

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All 14 chapters — CBSE Class 8 Mathematics Important Questions

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