Thorbjørn Ravn Andersen
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Mar
29
comment The lowest number that is a multiple of both 60 and the integer n is 180. Find the smallest possible value of n.
@MohammadAreebSiddiqui The "would have been 60. Therefore, we must have n==0 mod 3^2" snippet is not immediately self evident.
Mar
29
comment The lowest number that is a multiple of both 60 and the integer n is 180. Find the smallest possible value of n.
You may want to expand the "Therefore". The leap is not immediately clear.
Mar
13
comment How to tell what dimension an object is?
A circle still has two parameters to locate it in the 2D space. Angle and distance to center.
Jan
16
comment Why do Fourier Series work?
It is most likely more intuitive when you have learned complex numbers.
Sep
24
awarded  Autobiographer
Sep
18
answered why binary is read right to left
Aug
19
comment How far can one see over the ocean?
Note that this calculates the distance to the horizont where the completely smooth Earth begins to be in the way of itself. In order words, the distance where you can see the whole orc, including soles of his shoes. If you can live with seeing less of the orc, the distance is greater.
Aug
8
comment How much gas does a car use to carry its own gas?
@NathanCooper I just think you made the problem NP-complete by introducing price flunctuations ;)
Aug
8
comment How much gas does a car use to carry its own gas?
A similar problem is food depots when using dog sleighs to reach a given pole. You need a previous dog sleigh to put the last depot, so that trip also requires depots. If you need to go really far, the last depot becomes quite expensive to put.
Aug
8
comment How much gas does a car use to carry its own gas?
@SargeBorsch you could let the car run in neutral and the engine off while taking off speed. Optimally you would know exactly when to turn the engine off for the car to stop in the right spot on the gas station.
Aug
8
awarded  Commentator
Aug
8
comment How much gas does a car use to carry its own gas?
@chriswynnyk resulting in you stopping at every fuel tank on the way (but of course, time was not asked for)
Jul
22
comment Making 400k random choices from 400k samples seems to always end up with 63% distinct choices, why?
If you are concerned about the quality of your PRNG, tests are available to determine if it behaves as a true RNG which you may consider running.
Jun
27
comment Subtraction by addition
For this to work it is important that you stay within a given number of digits and discard those outside. Otherwise 9+3 will be 12 and not 2.
May
17
awarded  Editor
May
17
revised Why is cos(90)=0.4 in WebGL?
Descriptive title
May
17
suggested approved edit on Why is cos(90)=0.4 in WebGL?
Apr
25
comment Does 17% have to be equal to 0.17?
It needs to be 0.17 times something.
Feb
23
comment How do you describe your mathematical research in layman's terms?
Which open problems do you usually mention?
Feb
21
comment LaTeX/TeX Vs. Mathematica for Typesetting
What if you want to collaborate with persons who don't have Mathematica?