New answers tagged calculation-puzzle
10
Answer:
We can
0
As a bit of an update. Having seen a recent post on this question I asked Ernie if he knew the optimal solutions for six or more holes. Ernie muttered a bit about optimality but then drew the following diagram for me. He spent some time pointing out the regular tetrahedrons and the four axes of symmetry in the 9 hole solution and said that he thought that &...
4
I guess you were
And your grandfather was
Note:
2
This is a system of 4 equations with 4 variables:
From 2nd and 4th equation:
For easier writing let's put $1/c=x$ and insert $a$ and $d$ into 1st and 3rd equation:
From here it is easy:
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