Class 8 · Math · No. 01
Squares, cubes and their roots
Tiles, odd numbers and cubes
A square number is a number of tiles that makes a perfect square; a cube number makes a perfect cube. In this chapter you will build them, find their roots with odd numbers and prime factors, and meet Ramanujan’s 1729.
Think about it
Add the odd numbers 1 + 3 + 5 + 7 + 9. Why is the answer a perfect square?
In this chapter
- §1Square numbers
- §2Square roots
- §3Cube numbers
- §4Roots from prime factors
- ★Practice: 10 questions
- ◆Olympiad challenge: 5 questions
- ✓Recap: remember this
Class 8 plan
This chapter opens with the Class 8 plan
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Plate ISquares, cubes and their roots