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http://prntscr.com/ljuwnh

critical  Nov 18, 2018
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 Two consecutive numbers means one number is even, and one is odd.

 \(even\times even=even\) and \(odd\times odd=odd\) .

 Now, \(even-odd\) or \(odd-even\) both equal odd, so Tina is right.

 

You are very welcome!

:P

CoolStuffYT  Nov 18, 2018

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