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It looks like sudoku, but it’s a true test of arithmetic rather than being a pattern puzzle. "|j_ ~}]`j| | _[}`[]| `~ _|x ][ j[]|` ]_~ \~}x | ]_~ \~}x j| ] ~ }~~|]~ ` | }[^ [} j[\

_~ \~}x ` ~|j_ _~|` [\]`~ x~] [ x{\|}~x j|~ j|~x \x] }[\j~ ]_~ \~} in the top corner [} ~q|~ 9x means the \~}x \]` ][ ~{\|

TIP # $\~}x j| ~ }~~|]~ ` | j|~ |x [ |x ]_~ |}~ [] ` ]_~ x|~ `~ [} }[^