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#1 Utkrisht123

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Posted 15 December 2013 - 06:16 AM

In a classroom of standard of VIII somebody wrote an equation on a blackboard ; to the left of the equal sign is one symbol, and to the right three symbols. A boy remarked that if the symbol to the left of the equal sign were inverted and one of the three symbols to the right were erased, the equation would still be true and it contains no redundant or unnecessary symbols. What is the equation? 

(The line in a fraction counts as a symbol)


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#2 plainglazed

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Posted 04 January 2014 - 12:25 PM

Spoiler for a possible qualification?


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#3 BobbyGo

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Posted 13 January 2014 - 11:19 PM

Spoiler for Is it...

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#4 plainglazed

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Posted 15 January 2014 - 06:11 AM

Spoiler for or


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#5 harey

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Posted 20 January 2014 - 07:29 PM

I started with the left side. IMHO, the only symbols that can be reversed are operators (I do not believe i.e. that -8 is reversed 8). 

Just that there cannot be an operator alone.

 

Any other idea?


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#6 fabpig

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Posted 20 January 2014 - 07:39 PM

I started with the left side. IMHO, the only symbols that can be reversed are operators (I do not believe i.e. that -8 is reversed 8). 

Just that there cannot be an operator alone.

 

Any other idea?

"inverted", not "reversed"

Spoiler for How about


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You must not think me necessarily foolish because I am facetious,  nor will I consider you necessarily wise because you are grave.  Sydney Smith.


#7 harey

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Posted 21 January 2014 - 07:27 PM

Spoiler for I know it is cheating...


Edited by harey, 21 January 2014 - 07:28 PM.

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#8 fabpig

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Posted 22 January 2014 - 04:01 AM

When I re-read, I realised my solution above didn't conform to the OP.  Like harey, I have errrm "iffy" solutions

Spoiler for

However, I fear that our setter just aint bothered any more 


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You must not think me necessarily foolish because I am facetious,  nor will I consider you necessarily wise because you are grave.  Sydney Smith.





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