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John Bentin's user avatar
John Bentin's user avatar
John Bentin's user avatar
John Bentin
  • Member for 4 months
  • Last seen more than a month ago
  • Oxford, United Kingdom
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15
Do 1.5% of lithium-ion batteries overheat, explode, or catch fire each year?
Mar 2
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131
Why is the Penrose triangle "impossible"?
74
Find $xy+yz+zx$ given systems of three homogenous quadratic equations for $x, y, z$
36
How few disks are needed to cover a square efficiently?
35
To sum $1+2+3+\cdots$ to $-\frac1{12}$
32
When do two functions become equal?