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Mathematics
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Doug M's user avatar
Doug M's user avatar
Doug M
  • Member for 8 years, 5 months
  • Last seen more than 2 years ago
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139
What is the smallest positive multiple of 450 whose digits are all zeroes and ones?
Aug 25, 2016
115
Find the height of a bar, given the lengths of shadows cast by it and another bar
Oct 13, 2017
46
Can anything interesting be said about this fake proof?
Apr 4, 2017
46
Why do we use radians for polar coordinates rather than degrees?
Jul 18, 2017
36
Why is the tangent of an angle called that?
Nov 23, 2019
33
How can I find integers which satisfy $\frac{150+n}{15+n}=m$?
Dec 12, 2018
25
What is the largest eigenvalue of the following matrix?
Jan 30, 2018
20
How to solve this in an efficient way (without calculators)
Mar 20, 2017
20
How to show this formula to get a square root of a number in "just few seconds" is true?
Jun 23, 2016
19
What is $\operatorname{Var}(X - Y)$?
Oct 9, 2018