Algebra Play — Chapter Summary
CBSE · Class 8 · Mathematics
Summary of Algebra Play for CBSE Class 8 Mathematics. Key concepts: A number is thought, The same kind of trick can and Let the month be M.
Interactive on Super Tutor
Studying Algebra Play? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for chapter summary and more.
Free trial, no card needed.
Overview
Algebra can be used to explain number tricks, solve hidden-number puzzles, and discover patterns in shapes and grids. The chapter brings together ideas such as letter-numbers, place value, repeated patterns, and divisibility. Many tricks that look magical become clear when unknowns are written as va
Key Concepts
A number is thought
A number is thought of, doubled, increased by four, divided by two, and then the original number is subtracted. Writing the number as x gives 2x + 4 d
The same kind of trick can
The same kind of trick can be changed to make a different fixed answer, such as 3 or 5. The idea is to adjust the steps so that the algebraic result b
Let the month be M
Let the month be M and the day be D. After the given steps, the final number becomes 100M + 165 + D. If the final answer is known, subtracting 165 hel
In a number pyramid
In a number pyramid, each number is the sum of the two numbers directly below it. For the pyramid with top 60 and bottom row 12, c, 8 with middle a, b
The sequence begins 1
The sequence begins 1, 2, 3, 5, ... and each number is the sum of the two numbers before it. It is used in pyramid exercises to explore how patterns g
Learning Objectives
- Understand how algebra explains number tricks and puzzles
- Use variables to represent unknown numbers in patterns and grids
- Solve number pyramid problems using row-by-row equations
- Find the hidden date in a date-guessing trick using place value
- Discover patterns in calendar grids and algebra grids
Frequently Asked Questions
What are the important topics in Algebra Play for CBSE Class 8 Mathematics?
How should I revise Algebra Play for Class 8 exams?
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Algebra Play
Practice Quiz
Test yourself with a quick quiz
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Formula Sheet
The chapter's formulas in one place
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Flashcards
Quick-fire cards for active recall
Syllabus
What topics to cover
For serious students
Get the full Algebra Play chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for CBSE Class 8 Mathematics. Free to start, no card needed.