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Question 4 - Page 137 - ‘Think of a Number’ Tricks - Chapter 6 Class 8 - Algebra Play (Ganita Prakash II)
Last updated at March 6, 2026 by Teachoo
Class 8 (Ganita Prakash - 1, 2 & Old NCERT)
Chapter 6 Class 8 - Algebra Play (Ganita Prakash II)
-
‘Think of a Number’ Tricks
- Number Pyramids
- Figure it out - Page 140
- Fun with Grids
- The Largest Product
- Decoding Divisibility Tricks
- Figure it out - Page 145-147
Transcript
Question 4 - Page 137 Try to devise your own ‘Think of a Number’ trick.Let's create a brand new one that always results in the number 10 . You can test this out on anyone. Think of a number: N Multiply it by 2: 2 × N = 2N Add 20: 2N + 20 Divide by 2: (2𝑁 + 20)/2 = N + 10 Subtract your original number: N + 10 – N = 10 No matter what number they pick, the Ns cancel each other out, and they are left staring at the number 10 !
