17 + 16 = 33... At least that's what I was taught when I was at school !
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Since there are five numbers there,their mean is 1/5 of their sum.
16 17 18 How to get the answer.... 51/3 = 17 17+1= 18 17-1= 16
15, 16 and 17
The numbers are 16 and 17.
-16 and +17