Mistake

Algebra Level 1

While squaring a non-zero number John added the number to itself instead of multiplying with itself. John still got the correct answer. Find the number John started with.


The answer is 2.

Rudresh Naik by RUDRESH NAIK , 18, India

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2 solutions

Chew-Seong Cheong
Mar 29, 2016

n × n = n + n n 2 = 2 n ⇒ n = 2 \begin{aligned} n \times n & = n+n \\ n^2&=2n \\ \Rightarrow n&= \boxed { 2} \end{aligned}

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Sir I m not talking about this one but your solutions are out of the box.

Aditya Narayan Sharma - 5 years, 2 months ago

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1^1/2 = 1 1×1 = 1

Ozer Tamer - 5 years ago
Ashish Menon
Jun 29, 2016

x × x = x + x x 2 = 2 x x = 2 \begin{aligned} x×x & = x+x\\ x^2 & = 2x\\ x & = \color{#3D99F6}{\boxed{2}} \end{aligned}

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