Matchstick Equation

Logic Level 1

Is it possible to make this equality above true without adding, removing or moving any matchstick?

Yes, it is possible No, it isn't possible

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10 solutions

Rotate the picture by 180 degrees, we have

These numbers are written in Roman numerals, X = 10 \rm {X} = 10 , I X = 9 \rm {IX} = 9 , I = 1 \rm{I} = 1 . Thus equation is indeed true because X = 10 = 9 + 1 = I X + I . \rm {X} = 10 = 9 + 1 = \rm {IX} + \rm I .

Yes, did it the same way

Ashish Menon - 5 years, 3 months ago

I too do the same...

Akash Kumar - 5 years, 3 months ago

Same Way Guillermo

Kushagra Sahni - 5 years, 3 months ago

Exactly Templado!

Akhash Raja Raam - 5 years, 3 months ago
Enric Florit
Mar 2, 2016

You can read it this way:

+ X = X |+X|=X

Oh man, Brilliant.Excellent Solution :D

Mehul Arora - 5 years, 3 months ago

That's what I thought as well

Gabriel Crauciuc - 5 years, 3 months ago

ingenious!

Anindya Mahajan - 5 years, 3 months ago

But if X is a negative number this solution is incorrect. If you take X as a Roman Number, i think |X| is not legal.

Stefano Gallenda - 5 years, 3 months ago

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Why is it not legal?

Mehul Arora - 5 years, 3 months ago

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Did Romans used Abs Values? I think it is not legal in Roman Number Math.

Stefano Gallenda - 5 years, 3 months ago

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@Stefano Gallenda It's not a question of whether they used it. It's just that it is a concept now and it can be used! It's all about abstract thinking.

Mehul Arora - 5 years, 3 months ago

Outstanding!

Jelani Sarker - 5 years, 3 months ago
Level 17
Jan 18, 2018

If you turn it over it is 4+1 which equals 5

Of course :) X X and I I are variables. The equation will be true if I = X X + 1 , I = \frac X{X+1}, for instance if X = 1 X = 1 and I = 1 2 I = \tfrac12 or if X = 2 X = 2 and I = 2 3 I = \tfrac23 .

John Dowe
Mar 2, 2016

Oh..? I just turned the picture thru 180°

Loving this app Cant believe how much i dont know .. But its good learning.

A Steven Kusuman
Mar 2, 2016

Just answer yes for this kind of question :D , lol , im sorry :(

Noel Lo
Mar 2, 2016

Turn it upside down.......

Jet Sirilim
Mar 2, 2016

I just saw a symmetry picture. Something with equality is balance but something balance may not equal.

Sonia Gupta
Feb 26, 2016

Yes, it is possible by rotating the figure and see it by inverting it by 180*

Amar Mavi
Feb 24, 2016

rotate the picture.by 180 *

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