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25+-2

 Sep 25, 2016
 #1
avatar+249 
+5

25+-2 = 25-2 = 23

 Sep 25, 2016
 #2
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0

25+2=27

 Sep 25, 2016
 #3
avatar+1090 
0

It's 25 + -2, not 25 + 2, so the answer's 23, not 27.

Mathematician  Sep 26, 2016

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