i don't seem to be able to get -4
asked Dec 6, 2017 in Other Math Topics by anonymous

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1 Answer

You can’t get -4 for the following reasons.

ODD±EVEN=ODD

ODD±ODD=EVEN

EVEN±EVEN=EVEN

Since only addition and subtraction can be used we have:

(EVEN±ODD)±ODD±(ODD±EVEN)

(ODD±ODD)±ODD

EVEN±ODD=ODD so, since the result -4 is even it cannot be achieved.

answered Jan 1 by Rod Top Rated User (582,880 points)

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