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 Yearling
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Apr
29
awarded  Yearling
Aug
2
comment Solving $5^n > 4,000,000$ without a calculator
your memory has more significant figures than mine.. bravo.. I knew it was< 0.1% but close enough for government work.
Aug
1
comment Are non-circular manholes possible?
You need to define the boundary requirements. lip edge width etc. manhole specs. etc.
Jul
31
comment Are non-circular manholes possible?
kindky ammend your question to indicate what you expect. "A mathematical proof of a non-circular manhole that fits , easy to remove, and will not fall in the hole with complex shapes added,or proof that it is impossible."
Jul
31
answered Solving $5^n > 4,000,000$ without a calculator
Jul
30
answered Are non-circular manholes possible?
May
14
revised Is it wrong to tell children that $1/0 =$ NaN is incorrect, and should be $∞$?
added 873 characters in body
May
13
revised Is it wrong to tell children that $1/0 =$ NaN is incorrect, and should be $∞$?
added 488 characters in body
May
13
revised Is it wrong to tell children that $1/0 =$ NaN is incorrect, and should be $∞$?
added 488 characters in body
May
13
answered Is it wrong to tell children that $1/0 =$ NaN is incorrect, and should be $∞$?
May
1
awarded  Autobiographer
Apr
29
awarded  Teacher
Apr
29
awarded  Editor
Apr
29
revised How to avoid arithmetic mistakes?
deleted 1 characters in body
Apr
29
answered How to avoid arithmetic mistakes?