English Language & Usage
John Bentin's user avatar
John Bentin's user avatar
John Bentin's user avatar
John Bentin
  • Member for 11 years, 11 months
  • Last seen more than 3 years ago
  • Oxford, United Kingdom
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130
Why is the Penrose triangle "impossible"?
74
Find $xy+yz+zx$ given systems of three homogenous quadratic equations for $x, y, z$
35
How few disks are needed to cover a square efficiently?
34
To sum $1+2+3+\cdots$ to $-\frac1{12}$
29
When do two functions become equal?

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