Re: Toughest Riddle Ever - see if you can get it
I feel cheated. I did not know you could use grouping. Isn't that sort of introducing algebraic concepts, when the question implies basic arithmetic only.
That expression is equivalent to 3 / 7 * 7 + 3 * 7 when the grouping is expanded. Too many numbers.
Maybe I'm just nitpicking because I'm tired.
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