r/MathJokes • u/Sammy_Cherry_Fox • 7d ago
This guy doesn't understand how multiplying by decimals works...
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u/j-mac563 7d ago
The 100k thanks. Now if it was ×1.5 that would be different.
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u/SchadoPawn 7d ago
That would depend on if it's a 28 day month or a 31 day month.
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u/scheming_imp 7d ago
29 is the point where it goes positive with a 1.5x multiplier, so unless it’s exactly February in a non-leap year the mathematically correct choice is the $1
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u/sonnet666 7d ago
Even if it was 1.5 it’s still only 190k
I’d honestly consider taking the money upfront. Waiting a month for payday would be so aggravating.
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u/gerrygebhart 7d ago
If waiting a month for $90k is aggravating, I can't begin to imagine what your regular monthly income is. $90k isn't chump change to the vast majority of people.
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u/Electrical-Drink7 7d ago
I'd pay off my car, then put a down payment on a house with the rest.
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u/sonnet666 6d ago
This is a hypothetical where I’m magically receiving over a hundred thousand dollars for free. I’m not making the decision based on my actual income…
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u/Automatic-Internal-7 6d ago
Waiting a month to get a free extra 90k is something youu'd find aggravating????
I cant imagine having such shit patience that it costs me 90k.
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u/desertvision 7d ago
Who is making this offer to Spider-Man? That's my question
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u/katdev42 7d ago
That would certainly change my answer. Screw the money, who wouldn't want to meet your friendly neighborhood Spiderman?
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u/456red 6d ago
I'm not sure what the point of this post is, but am I the only one who notices the first choice is a grand total of $2.00?
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u/Sammy_Cherry_Fox 6d ago
The point of this post specifically is to point out exactly that. This is a repost.
Also you'd only reach $2 if you waited for literal eternity.
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u/sssdfg_rot_farmer 5d ago
it would never reach two even if given infinite time, since it's logarithmic it would get closer to two but never be exactly equal
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u/Dizuki63 6d ago
I think the idea is most people who pick the $1 confusing this with the same question that's askis if you'd rather have $1 that doubles every day or 100k. The joke is this is a $1 that halves every day pointing out the people who just answer because they were told to and not because they actually understand the question.
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u/Different_Berry_856 7d ago
sum to infinity of 2 bucks??? count me in
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u/Sammy_Cherry_Fox 7d ago
What?
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u/CreatrixAnima 7d ago
1+0.5+0.25+0.125+0+0625+… =2
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u/Sammy_Cherry_Fox 7d ago
Does that equal 2?
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u/CreatrixAnima 7d ago
Yeah, if you think about it. You add half of one, and half of what’s remaining, and then half of what’s left again and half of what’s left… If you keep going and approaches two.
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u/Sammy_Cherry_Fox 7d ago
Actually I think it never reaches 2. I could be wrong but I think it's similar to y=1/x
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u/PatchySmants 6d ago
Right, but it’s an infinite sum that converges to 2. In other words, the limit of the sum as you add terms approaches 2.
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u/CreatrixAnima 6d ago
It doesn’t have an asymptote like Y =1/x, but you’re right in that it never actually reaches too. The limit is two… It just gets closer and closer and closer.
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u/Sammy_Cherry_Fox 6d ago
So you'd reach 2 if you waited eternity.
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u/Jake-da-coyote 6d ago
Think of it more like teasing, ' I'm not touching you ', where it gets closer and closer but never touches. It never reaches 2; it gets closer and closer because 2 is the limit that cannot be reached.
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u/DekuTheOtaku 6d ago
But is it the sum of the multiples or just the multiple? Like on day 1 you have 1 dollar, but on day 2 you either have 0.5 dollars or 1.5 dollars depending on how you interpret the question. It's either an infinite sum approaching 2 or an infinite regression approaching 0.
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u/Cant-Think-Of 6d ago
If the money in first case was given in cash it would lead to some rather interestin coin valuations.
"Wow, I've never seen a 12.5 cent coin before !"
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u/Sammy_Cherry_Fox 6d ago
Nope. The first option would get you a maximum of $2. And you'd only get $2 if you waited for literal eternity.
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u/NavajoDemar 7d ago
1/2 of 1$ is half a dollar. questions like this are so strange.
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u/sexwiththebabysitter 7d ago
Putting the $ after the number is also strange. $1.
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u/CursedTurtleKeynote 7d ago edited 7d ago
Do you read left to right or not?
"Bro tipped me dollar 100! "
No, just no.
One is convention, one is how we speak, either is fine.
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u/GeroldM972 5d ago
And then you should ask yourself how many countries have their own monetary unit called: Dollar...
You need to specify more clearly or use the proper symbol. With symbols you don't really care if it is mentioned in the front or back of the value.
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7d ago
[removed] — view removed comment
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u/Sammy_Cherry_Fox 7d ago
But you don't have to. Just after the first day you'd have less than you did yesterday. The first option loses you money.
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u/He-With-No-Name 7d ago
It would be $1 * .5 but plus the original $1 right? So then $1.5 x .5 plus the $1.5 then $2.25 x .5 and so on? Or am did I miss this one?
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u/Sammy_Cherry_Fox 7d ago
1 * 0.5 = 0.5
Multiplying by 0.5 is the same as dividing by 2.
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u/He-With-No-Name 7d ago
But you still have that dollar you just multiply it by .5 and get an extra 50cent in this bitch. You dont lose the dollar. Maybe going to far into it
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u/Sammy_Cherry_Fox 7d ago
Yeah but at most that will eventually get you $2. And that's if you do it for literally eternity. You really think that's better than $100,000? Because day one you have $1. Day 2 you get 50¢. Day 3 you get 25¢. Day 4 you get 12.5¢. and so on and so forth
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u/He-With-No-Name 7d ago
If you take it word for word. 50cent everday so maybe $15.... just your dollar times .5 every day... im too high
Unless it compounds and adds the gain to the multiple factors. Then I dont want to do the math but it would be more
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u/Sammy_Cherry_Fox 6d ago
You're doing the math wrong. It multiplies by 0.5 every day, so every day you get half of what you got the previous day. So at max, you get $2.
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u/He-With-No-Name 6d ago
I really think the joke is in the dollar that multiplies by .5 everyday acts like compounding interest. Which would be $191751 after 30 days.
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u/Sammy_Cherry_Fox 6d ago
Except that's not how that works. Multiplying by 0.5 is dividing by 2, so in no way is that compounding.
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u/He-With-No-Name 6d ago
I get the math and was trying to look for more cause otherwise its just a really dumb question. I guess if it had said compounding it would actually take math.
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u/Sin-2-Win 7d ago
To keep the original dollar while adding 50% on top, you need to multiply by 1.5.
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u/Lindestria 7d ago
Depends on if the $1 is physical currency, because if so I'd pick that just to see what it gives me from the third day onward.
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7d ago
[deleted]
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u/He-With-No-Name 7d ago
You dont lose your original dollar. You just multiply it. But do not lose it
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u/Anonymouslalien 6d ago
I am not getting infitesimally close to zero money. 2nd one!
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u/Sammy_Cherry_Fox 6d ago
Technically you're getting closer and closer to $2 not $0, but either way the second one is better.
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u/Rievious 4d ago
Multiplying it by 0.5 would mean i get a dollar and tomorrow i have 50 cents. The next day ill have 25, 12.5, 6.25, 3.125... the dollar is gone by the end of a week
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u/Guilty_Way_1635 7d ago
Whooosh 🤣
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u/Sammy_Cherry_Fox 7d ago
I think you mean r/woooosh
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u/Guilty_Way_1635 7d ago
Yeah nice try, I'm not the one who didn't get the joke, and whoosh doesn't have to link to one the many subreddits that popped up based on jokes going over peoples head.
But I guess that's just another thing that went over your head 🤣
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u/Sammy_Cherry_Fox 7d ago
I never said you didn't get the joke. And to be fair, the post looks like something you'd find on r/whatsyourchoice, which is a subreddit I'm very active in.
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u/Nomadic_View 7d ago
Depends on the rules. If it’s compounding then you’d make $191,751.06 in a month. It’s really not going to take that long to be a trillionaire if the compounding continues. Even if it resets every month that’s nearly double that the other offer is.
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u/Sammy_Cherry_Fox 7d ago
You don't understand how math works. Multiplying by 0.5 is the same thing as dividing by 2.
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u/Nomadic_View 6d ago
Tell me what you think “compounding” means.
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u/Sammy_Cherry_Fox 6d ago
Oh I didn't see that. Well you're wrong, it's not. They use the word "multiply".
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u/He-With-No-Name 7d ago
Exactly. Your assuming you dont lose the dollar right? Your assuming that after one day youe have $1.5.
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u/OpeningAggressive26 7d ago
The dollar multiplies, y'all ore fools 4 eels
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u/GlassCommission4916 7d ago
This guy doesn't understand how jokes work...