13h
comment How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
update: A few minutes testing with real (albeit not the one pictured) coins suggests that this strategy would work better on a hard surface than a soft one, and better with heavy coins than light ones. (hypothesis: soft surfaces or light coins tend to result in the coin interacting with the tabletop less; they just bounce once and settle, whereas a heavier coin will bounce many times and roll around while maintaining contact with the table). My Australian 50c piece on a hardwood table randomised quite well, in casual testing, but less so on a bed, and less so with a smaller coin.
13h
comment How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
(All of which is to say that no, an enclosed rolling area is not required; where the die lands relative to the coin isn't providing any true randomness; the randomness comes from the the angle at which the coin settles)
13h
comment How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
@DrZ214 Sadly/happily, I do not live in Westeros, so don't have this coin to hand. ;) The key trick to this approach is that the orientation of the coin is being randomised during the roll. In fact, the die isn't strictly speaking necessary; it just provides a convenient way to generate a line to compare against the points of the star. You could instead choose any arbitrary direction before tossing the coin ("north" seems an obvious choice), and then exclude the die entirely; this method would work just as well that way.
Feb
10
comment How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
@f'' That's awesome; I had no idea there were 7-sided coins out there in the real world! I clearly need to get out and see more of the world! More 7-sided coins
Feb
10
comment How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
(of course, the critical flaw with this answer is that if you live in Westeros, the days of the week appear not to have names, or any precise number. So while you have the perfect coin with which to randomly select a day of the week, and it's commonly available, you don't have the days of the week from which to select!)
Feb
10
answered How to get a uniform 1 out of 7 chance, using only a coin and a 6-sided die
Feb
5
comment Using VBO in Opengl. powered with c# TAOFramwork
@ratchetfreak You beat me by 20 seconds. (should have been posted as an answer, though!)
Feb
3
awarded Necromancer
Feb
2
awarded Custodian
Feb
2
reviewed Reject suggested edit on The 12 islander question
Feb
1
answered Riddles/puzzles having answer hidden in the question?
Feb
1
awarded Yearling
Feb
1
awarded Yearling
Jan
29
awarded Nice Answer
Jan
24
comment A Strange Planet with Strange Genders
@f'' After some thought, I agree. In order to avoid the possibility of all individuals becoming the same gender, the number of one gender mod 3 must be 0, another gender mod 3 must be 1, and the third gender mod 3 must be 2. (for reasons discussed in my own answer). And with those values (the values required in order to be unable to attain a mono-gender population), we're guaranteed that the total population will be a multiple of 3.
Jan
23
comment A Strange Planet with Strange Genders
What if the number of creatures is not divisible by 3?
Jan
23
revised A Strange Planet with Strange Genders
added 5 characters in body
Jan
23
answered A Strange Planet with Strange Genders
Jan
23
answered Card Passing Game
Jan
21
revised Sphinx-related riddle
deleted 23 characters in body
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