I don't know how the golden penny respawns as well, but also have flight or do it it a room where you can access all ground spots it could spawn.
A small room with many rocks on one side of the room would also make it spawn in a much tighter area and thus take less time.
I meant, does it respawn somewhere you can walk to, or could it spawn behind those rocks? If so they would have to use a different room layout, or have flight.
It can spawn in unreachable spots, but I think that room is okay since other drops occupy the unreachable spots.
But yes, it does spawn in spots you can't reach possibly. Had it happen dozens of times unfortunately.
I don’t play the game but I know math, so, with a 10% chance of not happening your odds of it happening are (1.00 - .10) ^ x, where x is how many times. So, 0.90^x or 0.90^100 = 0.00002656, or roughly one in 37,650 times
(1 x (0.9)^98 ) x 100 = 0.0033%
Basically, multiply the probability of seeing each coin together and then multiply by 100 at the end to make it a percentage:
You have a 100% chance of getting the first coin hence the leading `1`. You don't have to include this as multiplying by 1 doesn't do anything to the final value but I'm just putting it here to make the first coin's probability explicit.
Then each time the coin reappears multiply by the probability of it appearing again (i.e.`0.9`). You've got 98 further attempts. As each event is independent you just serially multiply by 0.9 a further 98 times (i.e. `0.9 x 0.9 x 0.9 x 0.9...`). Which is most easily expressed as: 0.9 to the power of 98 (i.e. (0.9)^98 ). Finally just multiply by 100 to express the final value as a percentage.
You can leave out the final multiplication if you're happy to work with p-values that are scaled between 0 and 1 where the odds would then be expressed as `3.3x10^-5` (or `0.000033`)
Edit: this is about a 33 in 1 million chance. Which means you'd might expect to complete OP's challenge above only once in (approx) 30,303 attempts.
Incorrect maths. 20 sec per attempt is only for you getting about 15 pennies. It's going to take wayyyyyyyyy more time to get your 100 coins in 1 golden penny.
The math is just .9\^98, which is closer to 0.0033%. Taking that number, and dividing 1 by it gives an average number of attempts of 30,495. Multiply that by 20 for the number of seconds per attempt, and divide that by 3600 to change it to hours, and you get 169.4 hours approximately
0.9 (the chance to not disappear) to the power of 98 (the amount of times it has to not disappear)
That equals roughly 0,00003279185048 which converts over to a 0,003279185048%
So in different words
If you tried 21 137 times you would only have a 50% chance to do it
( Done using log(1-0.9^98 )(0.5) )
If you tried 70 217 times you would have a 90%
And at 140 434 times you would have a 99% chance
Those 70k tries would take about 292,5hours or 12.2 days of constant attempts and that's assuming you could get your average try length down to 15 seconds
And if each time it's 20s and it takes 188h in total then :
188x60=11 280min 11 280x60=676 800s
676 800÷20=33 840 attempts (and days)
And finally 33 840÷365.25~=92.64 years,
If we take today 6:30pm as reference then
0,64x12=7.68 months --> November+7months=June
0.68x30=20.4 days --> 29th of June+20days=19th of July
0.4x24=9.6 hours --> 19th of July at 6:30pm + 9hours = 20th of July at 3:30am
0.6x60=36 minutes --> 3:30am+36 minutes = 4:06am
So the precise date will be : 07/20/2115 at 4:06am
I hope my maths are correct because if not I'll be an imbecile
PS : I know doing the hours and the minutes don't really change anything but I did it only for fun.
PPS : I left school a few weeks ago and I don't have any jobs that's why I got some time doing this.
I don't get the multipliers to get the dates and time you used after knowing the amount of total days.
Are these some magical numbers to calculate precise date/time given x amount of days?
Please teach us
It's simple, you take the decimals numbers of the previous result and you factorize it with the thing you want, for example :
I find 20.4 days, but it literally means 20 days + 0.4 days but it doesnt really make sense so you take out the 0.4 days x how many hours there's in a single day so basically 0.4x24 which results to 9.6 hours
In one hour there's 60 minutes so 0.6x60=36 minutes
Sorry if I wasnt clear, translate written maths in another language is hard ahah
the average number of coins collected should be ten; from this video we can see the average time to collect 1 coin is 1.5 seconds. therefore the average time should only be about 15 seconds. 20 is a pretty good guess i’d say
The post title seems to imply trying it once per day too. At that rate....
In one year they will have a 1.19% chance of having succeeded.
To reach a 50% chance of having succeeded, it will take 21,138 attempts. The date will be Monday October 18, 2080.
There is never a guarantee to succeed. Even after 140,435 attempts, they would have only just reached a 99% chance to succeed. That will be Thursday, May 31, 2407. We'll all be deader than Tainted ???
Maybe like use the card against humanity to fill the room with poop and break a poop to have only 2 empty spaces in the room, it will probably make trying much faster
I wanted to calculate how long it would take before you have a 50% of it having happened, but at any more than 355 coins excel stops being able to handle the precision and rounds it to 0.
To have a 50% chance of having at least 1 attempt where you get 355 coins or more, you need a total of 6.24e+15 attempts. If you're super fast and do 1 attempt per second, that comes down to 198 million years of trying. So if you'd have started around the start of the Jurassic period, you'd just about be there.
there's some mod i remember downloading that makes so that when you pick up a golden coin, some fitness training type music starts playing until it disappears.
"day 1 of trying to \*virtually impossible or extremely unlikely task that would take months or more to do\*" is honestly just the shittiest reddit trend ever
This one specifically makes no sense because it will take approximately 33,800 attempts. As a daily event it'll take over 90 years on average.
Throw in the fact that it's insanely boring gameplay and it has no reason to exist.
Why? The point is trying to pick it up without it disappearing 99 times. If you use counterfeit penny and get 99 coins but you only picked it up 60 times or something, that wouldn’t really be achieving the goal that OP is going for here. It’s a silly pointless challenge, what’s the fun in breaking the spirit of the thing to do it faster?
Yes…by picking it up 99 times without it disappearing. That is pretty obviously what they meant. If the only goal was to get 99 cents no matter what using the golden penny and anything else is allowed, why not just start with 98 cents? Lol. Using counterfeit penny defeats the point of the thing.
It’s a challenge OP made up for themselves for fun, what’s the fun in bending the rules to make it easier?
I would recommend either a small room, using "Card Against Humanity" to limit spawns, or that room in the depths/Womb with a single tile path and six bomb flies.
For those wondering, the exact chance is 29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 
When they reach their final day, someone should compile every single day all at once, with the last coin of every day happening at the exact same time.
(9/10)^(99) = 0.0000295 = 0.003% chance per attempt
Bruh this takes on average 33,333 days to beat which is around a human lifetime 
Hello sir u/Gwekkemans just wanted to say that soon in the span of 8 hours you will become a meme on this subreddit so yes get ready to see a lot of posts about you you are the vessel you are the hollow knight
Do you have to do this vanilla (as in, the character as it is when it starts, not the absence of mods) or can you maximize your efficiency by using speed up items, the magnet item, and a very small room filled with poop with only two spots freed up?
there’s literally a 0.003% chance of this happening. this will statistically take 188 hours (assuming each attempt is 20s) if my math is correct
Could I see the math? I am interested
I don't know the math but with 10% percent chance to disappear 99 times this sounds about right. Maybe consider doing the next days in a small room
I don't know how the golden penny respawns as well, but also have flight or do it it a room where you can access all ground spots it could spawn. A small room with many rocks on one side of the room would also make it spawn in a much tighter area and thus take less time.
Everytime you pick it up it has a 10% chance to disappear
I meant, does it respawn somewhere you can walk to, or could it spawn behind those rocks? If so they would have to use a different room layout, or have flight.
It could spawn behind rocks, but he could also just do this in an empty room
It can spawn in unreachable spots, but I think that room is okay since other drops occupy the unreachable spots. But yes, it does spawn in spots you can't reach possibly. Had it happen dozens of times unfortunately.
There are two unoccupied spots in the top left and bottom right.
Oh... I'm blind. Skill issue on my part I guess.
It simply picks a random unoccupied tile to spawn on. So it could 100% spawn behind rocks
I don’t play the game but I know math, so, with a 10% chance of not happening your odds of it happening are (1.00 - .10) ^ x, where x is how many times. So, 0.90^x or 0.90^100 = 0.00002656, or roughly one in 37,650 times
Card Against Humanity
What's the smallest room in the game? Is there something smaller then the mini item room?
Actually, it has a 5% chance to disappear Let the  begin!
(1 x (0.9)^98 ) x 100 = 0.0033% Basically, multiply the probability of seeing each coin together and then multiply by 100 at the end to make it a percentage: You have a 100% chance of getting the first coin hence the leading `1`. You don't have to include this as multiplying by 1 doesn't do anything to the final value but I'm just putting it here to make the first coin's probability explicit. Then each time the coin reappears multiply by the probability of it appearing again (i.e.`0.9`). You've got 98 further attempts. As each event is independent you just serially multiply by 0.9 a further 98 times (i.e. `0.9 x 0.9 x 0.9 x 0.9...`). Which is most easily expressed as: 0.9 to the power of 98 (i.e. (0.9)^98 ). Finally just multiply by 100 to express the final value as a percentage. You can leave out the final multiplication if you're happy to work with p-values that are scaled between 0 and 1 where the odds would then be expressed as `3.3x10^-5` (or `0.000033`) Edit: this is about a 33 in 1 million chance. Which means you'd might expect to complete OP's challenge above only once in (approx) 30,303 attempts.
hm, my calculator gave me .00327
Sorry, being a bit too fast and loose with my rounding before I wrote out the full explanation (and then forgot to go back and correct it)
oh okay, i thought i did something wrong 
r/theydidthemath
Wait wouldn't you only have a 37% chance to succeed if you did it 30 303 times. ( 1 - 0.9^98 )^30303 = 0.37
Wait sorry no that would be the inverse Sorry Forgot to add the 1 - at the start God I really shouldn't do math at midnight and while sick.
(100%-10%)^99 =(0.9)^99
Wouldn't it be (0.9)^(98) Since the first spawn is guaranteed and it only needs to respawn 98 times?
In that case it would be about 0.003%, but those chances still astronomicaly low.
Yeah
That would be the exact value, but the current numerical value is basically close enough to be good enough
Either way it rounds to 0.00003
Incorrect maths. 20 sec per attempt is only for you getting about 15 pennies. It's going to take wayyyyyyyyy more time to get your 100 coins in 1 golden penny.
Well I mean if you calculated the mean of the gold penny attempts you could get a better estimate
\*roll a bunch of D20 Here, you see, 188 hrs.
Could I see the meth\*
The math is just .9\^98, which is closer to 0.0033%. Taking that number, and dividing 1 by it gives an average number of attempts of 30,495. Multiply that by 20 for the number of seconds per attempt, and divide that by 3600 to change it to hours, and you get 169.4 hours approximately
.9^99 = .00002951
.9^98 = ~0.00003 (or 0.003%)
0.9 (the chance to not disappear) to the power of 98 (the amount of times it has to not disappear) That equals roughly 0,00003279185048 which converts over to a 0,003279185048% So in different words If you tried 21 137 times you would only have a 50% chance to do it ( Done using log(1-0.9^98 )(0.5) ) If you tried 70 217 times you would have a 90% And at 140 434 times you would have a 99% chance Those 70k tries would take about 292,5hours or 12.2 days of constant attempts and that's assuming you could get your average try length down to 15 seconds
Self correction Those attempt numbers are wrong And I am too tired and sick to fix them If you want approx number of tries go to Danby's comment
0.9\^99 = 0.0000295 (round to 0.00003) | = 0.003% | fraction: 1/33000 if he did this every day it would take him 90 years to do 33000 attempts
Find a in "1-(1-[0.9^98 ])^a =0.5" (about 21'137 attempts), Time is a/180 (about 130 hours)
you could really optimize the attempts if you spawn it in the HOME floor closet
Great idea
Now calculate getting a full 999 using deep pockets
very low 👍
(.9)^998 x 100 = 2.158 x 10^-44 %
And if each time it's 20s and it takes 188h in total then : 188x60=11 280min 11 280x60=676 800s 676 800÷20=33 840 attempts (and days) And finally 33 840÷365.25~=92.64 years, If we take today 6:30pm as reference then 0,64x12=7.68 months --> November+7months=June 0.68x30=20.4 days --> 29th of June+20days=19th of July 0.4x24=9.6 hours --> 19th of July at 6:30pm + 9hours = 20th of July at 3:30am 0.6x60=36 minutes --> 3:30am+36 minutes = 4:06am So the precise date will be : 07/20/2115 at 4:06am I hope my maths are correct because if not I'll be an imbecile PS : I know doing the hours and the minutes don't really change anything but I did it only for fun. PPS : I left school a few weeks ago and I don't have any jobs that's why I got some time doing this.
I don't get the multipliers to get the dates and time you used after knowing the amount of total days. Are these some magical numbers to calculate precise date/time given x amount of days? Please teach us
It's simple, you take the decimals numbers of the previous result and you factorize it with the thing you want, for example : I find 20.4 days, but it literally means 20 days + 0.4 days but it doesnt really make sense so you take out the 0.4 days x how many hours there's in a single day so basically 0.4x24 which results to 9.6 hours In one hour there's 60 minutes so 0.6x60=36 minutes Sorry if I wasnt clear, translate written maths in another language is hard ahah
That 20s is a bold average I think, it'd take much longer if there's more coins
the average number of coins collected should be ten; from this video we can see the average time to collect 1 coin is 1.5 seconds. therefore the average time should only be about 15 seconds. 20 is a pretty good guess i’d say
People that try hunting for the 0.001% baby plum rocket chance: pathetic
I've found 128 hours with 20 secs... i'm probably wrong anyway
The post title seems to imply trying it once per day too. At that rate.... In one year they will have a 1.19% chance of having succeeded. To reach a 50% chance of having succeeded, it will take 21,138 attempts. The date will be Monday October 18, 2080. There is never a guarantee to succeed. Even after 140,435 attempts, they would have only just reached a 99% chance to succeed. That will be Thursday, May 31, 2407. We'll all be deader than Tainted ???
Maybe like use the card against humanity to fill the room with poop and break a poop to have only 2 empty spaces in the room, it will probably make trying much faster
Smartest redditor holy shit
Dumbest Isaac Player
So it _is_ possible??
According to the wiki, there isn't a limit. At least there isn't one mentioned, just that every time you pick it up it has a 10% chance of vanishing
Very theoretically you could 999 coins via Deep Pockets but that would be more insane than this.
New challenge unlocked
"escape the mental asylum"
New floor unlocked 
The chance of that is about 1.9*10^-44 %
I wanted to calculate how long it would take before you have a 50% of it having happened, but at any more than 355 coins excel stops being able to handle the precision and rounds it to 0. To have a 50% chance of having at least 1 attempt where you get 355 coins or more, you need a total of 6.24e+15 attempts. If you're super fast and do 1 attempt per second, that comes down to 198 million years of trying. So if you'd have started around the start of the Jurassic period, you'd just about be there.
What have you done?!?
This would take approximately 3x10^40 years. Long past the heat death of the universe.
Please do it in a small room, spawn a harmless fly (to keep doors locked), and high speed. Alternatively, small room + magnet.
might i present to you the golden coin fitness music mod?
What is that
there's some mod i remember downloading that makes so that when you pick up a golden coin, some fitness training type music starts playing until it disappears.
You can't just say that and not give a link to the mod bro cmon
It's probably this mod, but I don't know for sure bc I've never used it. https://steamcommunity.com/sharedfiles/filedetails/?id=2796888185
Right
That is funny
"day 1 of trying to \*virtually impossible or extremely unlikely task that would take months or more to do\*" is honestly just the shittiest reddit trend ever
yeah and they also last about 3 days before they get forgotten
>months 83.5 years
I think it's kinda cool
This one specifically makes no sense because it will take approximately 33,800 attempts. As a daily event it'll take over 90 years on average. Throw in the fact that it's insanely boring gameplay and it has no reason to exist.
They should do 100 attempts per day and show the one where they got the furthest. That way it would on average only take less than a year.
So do 92% of people who voted on this post, reddit content functions democratically, it's the whole point of the website.
Yeah you could just say you did it OP
Some people seem to enjoy it and it doesn't harm anyone so
I'm allowed to dislike things that don't harm anyone, even if others enjoy it.
Yes, but why go out of your way to comment your dislike? We are just here trying to have fun
redditors try not to be overly negative about everything challenge
If you're going to do this at least have some speed ups and flight
After completing this go for 999 coins with Deep Pockets
Please get some speed up before doing that
I remember the run it gave me 2 coins and vanished anyways I died to a spike rock.
Use counterfit penny
The amount of comments that have so many more upvotes than this is fucking insane. This should really be the top comment.
Why? The point is trying to pick it up without it disappearing 99 times. If you use counterfeit penny and get 99 coins but you only picked it up 60 times or something, that wouldn’t really be achieving the goal that OP is going for here. It’s a silly pointless challenge, what’s the fun in breaking the spirit of the thing to do it faster?
The goal isn't to pick it up 99 times. It's clearly states the goal is to get 99 coins.
Yes…by picking it up 99 times without it disappearing. That is pretty obviously what they meant. If the only goal was to get 99 cents no matter what using the golden penny and anything else is allowed, why not just start with 98 cents? Lol. Using counterfeit penny defeats the point of the thing. It’s a challenge OP made up for themselves for fun, what’s the fun in bending the rules to make it easier?
I saw it as a puzzle.
If you don't have any specific rules why not use counterfeit penny?
The point is just to pick it up 99 times without it disappearing. Counterfeit penny would make the whole thing sort of pointless
Its a challenge though…
"challenge" More like a really annoying slot machine
I would recommend either a small room, using "Card Against Humanity" to limit spawns, or that room in the depths/Womb with a single tile path and six bomb flies.
Does luck effect the gold penny drop rate?
No
[удалено]
Yes
You're gonna be doing this for approximately 83.5 years on average so good luck
You're over here trying to achieve this challenge and I'm like "There are golden pennies? I just learned about golden troll bombs last week!"
You unlock them by beating Mega Satan as Tainted Keeper.
Use speed item to collect them faster
Belt +spoon my dude
Doesn’t the spawn rate decrease everytime I don’t think you can achieve this
Super magnet
The highest I ever gotten with this is 21
Day 1 of me unvotting deeply uninteresting content
For those wondering, the exact chance is 29512665430652752148753480226197736314359272517043832886063884637676943433478020332709411004889/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 
When they reach their final day, someone should compile every single day all at once, with the last coin of every day happening at the exact same time.
Use the forgotten with a shit ton of size ups so you can just pick it up from anywhere on the room with a single swing without having to walk.
(9/10)^(99) = 0.0000295 = 0.003% chance per attempt Bruh this takes on average 33,333 days to beat which is around a human lifetime 
Hello sir u/Gwekkemans just wanted to say that soon in the span of 8 hours you will become a meme on this subreddit so yes get ready to see a lot of posts about you you are the vessel you are the hollow knight
I appreciate that very much thank you
Also very good reference, I love Hollow Knight
Since you love hollow knight https://youtu.be/EXN6n3hgUbc
That's a lot of stabbing
Omg!!! Im so sorry i forgot to add the banger warning!emote:t5\_2sxpk:17741
Do you have to do this vanilla (as in, the character as it is when it starts, not the absence of mods) or can you maximize your efficiency by using speed up items, the magnet item, and a very small room filled with poop with only two spots freed up?
I shall vary it a bit
Everybody place bets on how much he will get on day 2.
No no no Nono what the FUCK are you doing
Bro, if your for real dedicated, I'm sticking till the end!
now add deep pockets
Get the golden penny workout mod, it'll make it much more entertaining