Problem
First name
Mohamed Ali
School
King Solomon Academy
Country
Age
11
I first tried trial and error but I realised that it would take too long. So I just simply put the opposite number on each side. That didn't work so I adjusted it a bit and I finally got the answer:
n=8
8 ¦ 13 ¦ 12
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15 ¦ 11 ¦ 7
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10 ¦ 9 ¦ 14