Class 8 Maths · Part 2 Chapter 6 · CBSE / NCERT
Algebra Play
Using algebra to explain number tricks and puzzles. You’ll show why think-of-a-number tricks always work, solve number pyramids and calendar puzzles, and write equations for word problems.
10 short lessons · about 44 minutes in all
What you’ll learn
- 1Why a think-of-a-number trick always works4 min
- 2Reading a date back from a trick4 min
- 3Filling a number pyramid4 min
- 4The top of a pyramid, in letters4 min
- 5Sums in a calendar square4 min
- 6Finding what each shape is worth4 min
- 7Making the biggest product from three digits5 min
- 8Why reversing digits gives a multiple of 95 min
- 9Word problems with a letter for the unknown5 min
- 10Doubling, then paying a fee5 min
No account needed
Try lesson 1 free
Why a think-of-a-number trick always works · about 4 minutes
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More Class 8 Maths
The other 13 chapters.
PART 1 · CH 1A Square and a Cube11 lessonsPART 1 · CH 2Power Play11 lessonsPART 1 · CH 3A Story of Numbers9 lessonsPART 1 · CH 4Quadrilaterals11 lessonsPART 1 · CH 5Number Play11 lessonsPART 1 · CH 6We Distribute, Yet Things Multiply9 lessonsPART 1 · CH 7Proportional Reasoning-18 lessonsPART 2 · CH 1Fractions in Disguise10 lessonsPART 2 · CH 2The Baudhayana Pythagoras Theorem9 lessonsPART 2 · CH 3Proportional Reasoning–29 lessonsPART 2 · CH 4Exploring Some Geometric Themes11 lessonsPART 2 · CH 5Tales by Dots and Lines11 lessonsPART 2 · CH 7Area10 lessons
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