none! coz......if its a russian doll eventually wen u try stacking dolls on top of one doll, the other doll falls dues to the round surface......i knoe u think its dumb bt read it again...this makes sense!
0.00030517578125 cannot be halfed to produce a number above -0, halfing it becomes -3.something i think,
've just realised that i did not have to do all this in my head and that i could of used the calculator on my computer, anyway that is the answer right down to the last decimal place lol
@HellOfTheDevil1 obviously the number goes nearer and nearer to 0 the more often you divide it by two. It won't ever reach 0 though. I am pretty sure that 0.00030517578125 / 2 ≈ 0.00015 and not a negative number.
I'm not sure if you were trying to say that 0.00030517578125 / 2 ≈ -3. This can't be true. If z / 2 = -3, -3 x 2 = z. Minus three times two is minus six. If you halve any positive number you receive another positive number. Thus you won't reach -3 just by halving 20 again and again.
39.999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999909999999999999999999999999999999999999999999999999999999999999999999999999999999999999999... Or something like that...
well it would sop around 40 actually 39 because the number just keeps getting smaller actually half of the previous so it would eventually just stay theoretically put yes it would never end
0:25 "And so on until you have an infinate amount of dolls, ..." [sic] I assume I have an infinite number of the specified dolls at my disposal, therefore the total height of all dolls combined is 20*sum_(k=1)^infinity2^(1-k) = exactly 40 feet tall.
ITS NOT INFINITE! It will always remain just under 40 feet tall, because no matter how many dolls you have, they keep shrinking away from the totla goal of 40 feet. In questions like this, you can never quite reach double the size of the original subject. Some people... :L
if you stacked them horizantly there would be diffrent dimmentions and since it cant fall you could stackr them diagnally as well so no matter what you do there is no one right answer.
the answer is probobly around 38.00 to 39.00 because 1.25 is the only whole number so you wont get any more than the actually whole number so if you were to go infinite you would probobly end up around 40.0 because their is only so many decimals you can add to a whole number
the answer is infinity because each one has a height and you have infinite dolls and anything times infinity is infinity. EASY! also, i'm a fifth grader and i figured this out!
@tiabee33 You are stacking all the dolls on top of eachother. Of course, the 10 foot doll can fit inside the 20 foot doll, but as soon as you stack them, you get a stack which is 30 feet tall (which already surpasses 20 feet). Now, take the 5 foot doll and stack it on top, then the 2.5 foot doll.. ect. The question is, how tall can you make the stack?
never more than 20 ft tall, cause you would spend eternity taking each doll out of the other, if you had infinite amount of dolls, and nobody would care enough to try!!! :p
it says clearly they get stacked on top of each other. Its' a converging series, each term adding half the previous one, so it can never exceed 40 feet. The answer is 39.9 recurring feet.
easy ... the dolls height always gets divided by 2 -> there are infinite dolls cause you can divide every number (no matter how small it is) divide by 2
@K0xGH0STZz No it's not infinite, you mayhave infinite dolls but they are constantly shrinking away from the goal of 40 feet and you will never reach 40 feet.
40
feet
tall
yanton985 2 days ago
40!
IMGsims 4 days ago
so easy
evillivers 2 weeks ago
its a geometric series a=20
r=.5
S=a/(1-r)=40
tommike65 3 weeks ago
40 feet
CptGhost009 1 month ago
You can't divide them by 2 into infinity, there is a finite limit of division, it's called the Planck Length, or 1.616199(97) x 10^-35 meters.
karite36 1 month ago
btw putting them inside is techincly stacking so its 20 they will never fall
wesleybuff 1 month ago 2
@wesleybuff nay, it says on top of
vryfst 3 weeks ago
20+10+5+2.5+1.25+0.625+0.312.5 and so on... 40 feet :D
TheGibbzee 1 month ago
In order for the all dolls to fit in the 20 foot doll, they have to all together be less than 20 feet
sense there are infinite dolls the number would be infinitely close to 20 also known as 19.99999repeating
20+19.9999repeating= 39.999repeating or, 40 feet
robbyf5522 1 month ago
Exactly 40 feet... its an infinite geometric summation
Use the formula:
starting amount/(1-changing ratio)
20/(1-0.5)=20 / 0.5= 40
psufan571 1 month ago 2
40? or shorter cus i can't stack that high?
TerrariaAddict1 1 month ago
none! coz......if its a russian doll eventually wen u try stacking dolls on top of one doll, the other doll falls dues to the round surface......i knoe u think its dumb bt read it again...this makes sense!
0000tas 1 month ago
infinite. you said you have a infinite supply of dolls. so you have to have a infinite foot structure
MegaKeldric 1 month ago 2
@MegaKeldric i agree
vryfst 3 weeks ago
infinate, becuz it said that the dolls kept going on forever infinitly
naggydoomsp 1 month ago
It can not get over 20 feet tall.
ksec2012 1 month ago
This has been flagged as spam show
Infinitely close to 40, without being 40. So 39.999999....
myyz400 1 month ago
pi?
gothicrubyrocker 1 month ago
Just under 40 ft. I don't know how to say it mathematically
BeakyRed 3 months ago
@BeakyRed It's actually *exactly* 40 feet.
themissingn 2 months ago
This has been flagged as spam show
The awnser:
USE YOUR FUCKING HANDS
DrifterX2J 3 months ago
This has been flagged as spam show
The awner:
USE YOUR FUCKING HANDS
DrifterX2J 3 months ago
Infinity
AWESOMETMAN1 3 months ago
You can make it infinitely tall herp derp.
xXDottyBoyMeXx 4 months ago
infinity, you said there was an infinante amount of doll so that means you cant measure it, it never ends.
gumi1237 4 months ago
o yay speech bubble EASY! 20 F*CKIN FEET!!!
kittypieiscute 4 months ago
40ft?
VampireBobbette 4 months ago
37.5ft
chubbygit45 4 months ago
it's a convergent series and the anser is 40 feet
fulvo 4 months ago
There is no answer represented by a float or integer. The number is infinitely long.
Let the answer = X
39<X<40
rab236 5 months ago
40. Yay for grade 10 mathematics!
orion1722 5 months ago
it would be infinate, because there's infinate dolls.
blackfrost713 5 months ago
They said the amount of dolls was infinate so there is no answer!
TheJkoenig23 5 months ago
20+10+5+2.5+1.25+0.625+0.3125+0.15625+0.078125+0.0390625+0.01953125+0.009765625+0.0048828125+0.00244140625+0.001220703125+0.0006103515625+0.00030517578125=39.99969482421875
0.00030517578125 cannot be halfed to produce a number above -0, halfing it becomes -3.something i think,
've just realised that i did not have to do all this in my head and that i could of used the calculator on my computer, anyway that is the answer right down to the last decimal place lol
my head hurts now :(
HellOfTheDevil1 5 months ago
@HellOfTheDevil1 how would halfing a positive number give you a negative number?
eretrece 4 months ago
@eretrece quite simple my friend, the number got so small that there is no possible way for it to get any smaller
HellOfTheDevil1 4 months ago
@HellOfTheDevil1 obviously the number goes nearer and nearer to 0 the more often you divide it by two. It won't ever reach 0 though. I am pretty sure that 0.00030517578125 / 2 ≈ 0.00015 and not a negative number.
I'm not sure if you were trying to say that 0.00030517578125 / 2 ≈ -3. This can't be true. If z / 2 = -3, -3 x 2 = z. Minus three times two is minus six. If you halve any positive number you receive another positive number. Thus you won't reach -3 just by halving 20 again and again.
eretrece 4 months ago
@HellOfTheDevil1 Positive numbers can always be halved, and the answer is always positive. Even zero can be halved, and the answer is zero.
themissingn 2 months ago
Comment removed
HellOfTheDevil1 5 months ago
infinite.
KimmmPamela 5 months ago
39.99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
uno1bruno2 5 months ago
I think mom
20+10+5+2,5+1,25=38,25
OK ummm, i think 39,99999999999999999999999999999999999999999 and so on... which is actually 40 so, 40 feet.
RoronoaZoroSensei 5 months ago
Alright, you want to know how tall it goes?
X = 20
x+x/2+x/4+x/8...
PedroPaulo744 5 months ago
This has been flagged as spam show
Sorry, less than 40
christhevis 5 months ago
infinitely high?
christhevis 5 months ago
This is easy...it will be infinitely tall...duh...there is an infinite amount of times you can half any number.
Orangesoda65 5 months ago
It would be infinite, because there is an infinite amount of doll on top of each other.
mezelfikenjij 5 months ago
It would be as tall as I want it to be.
bob0s062 5 months ago
Infinite because the stack would never end. Whatever the number you halve, it will never be zero! :) I think...
263JJ 5 months ago
40 i would explain it but i don't feel like it
If anyone wants me to explain it I will I just don't feel like it right now If you want me to explain just say so in a reply
EpicSuccuss 6 months ago
39.999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999909999999999999999999999999999999999999999999999999999999999999999999999999999999999999999... Or something like that...
taykerou 6 months ago
That's going to be calculated with limits...isn't it?
caneboia 6 months ago
well it would sop around 40 actually 39 because the number just keeps getting smaller actually half of the previous so it would eventually just stay theoretically put yes it would never end
hottman97 6 months ago
The correct answer is 39.(9)
ptvanwinden 6 months ago
The stack would be infinite!!!
TheEyez187 6 months ago
Comment removed
AugustinusSextus 6 months ago
This has been flagged as spam show
0:25 "And so on until you have an infinate amount of dolls, ..." [sic] I assume I have an infinite number of the specified dolls at my disposal, therefore the total height of all dolls combined is 20*sum_(k=1)^infinity2^(1-k) = exactly 40 feet tall.
AugustinusSextus 6 months ago
Comment removed
AugustinusSextus 6 months ago
Comment removed
AugustinusSextus 6 months ago
the answer is an infinitely small number just under 40
notintere5ted 6 months ago
Comment removed
notintere5ted 6 months ago
33.75
ReginaSkitzo 6 months ago
@ReginaSkitzo ur adding is WAAAYYYYY off
hottman97 6 months ago
40 feet
antrthorn 6 months ago
ITS NOT INFINITE! It will always remain just under 40 feet tall, because no matter how many dolls you have, they keep shrinking away from the totla goal of 40 feet. In questions like this, you can never quite reach double the size of the original subject. Some people... :L
TheAstroSteve 6 months ago
FORGET THE RIDDLE! PUMP UP THE MUSIC!!!!
marinedude117 6 months ago
about 40ft.
Tara7895 6 months ago
Since the number is infinite, the total height is 40 feet.
Nostrojanus 6 months ago
waste of my life!
madisenrose1 6 months ago
infinite babushkas because you said "infinite dolls"
i think.... :/ x
lillybillson 6 months ago
An infinate Amout!
:D
TheRealBabyBluez 6 months ago
37.5 feet
coincrazybj 7 months ago
ok if he said INFINITE AMMOUT of dolls, then staking thenm would eventually make an infinitly tall tower until them universe implodes.
acau77 7 months ago
@missyimmy5 i agree with her
MrsCababalish 7 months ago
i can't believe the amount of people who think it is infinate... markus got it correct...
MisterFriggles 7 months ago
infinite if there is an infinite number of dolls it would be infinite
SuperShetz09 7 months ago
20 is the answer
ludalgato 7 months ago
man.. thumbs up if u muted sound because u think there was zombie on the end
KitChen5548 7 months ago
an infinite hight becouse you said it continued to get smaller infinitly so there for you would never fun out of things to stack.
jesuscares3737 7 months ago
This has been flagged as spam show
There is no answer Duh!
animallover16000 7 months ago
World's Hardest Riddle
I don't think so
It's not hard and it's not really a riddle - more a maths problem
ps markus031098 is correct
fridgelawless 7 months ago
ln19 i think... i used integration.. area under graph of 1/x
Gun5andR05e5 7 months ago
75 cm
conallowry 7 months ago
its infinate like the number of dolls... :)
BubbleGumGamer4427 7 months ago
Uhhhhhhhhhhhhhhhhhhhhhhhhh yah Fuck this
KnMCashman 7 months ago
infinite...
shadowkatie2 7 months ago
if you stacked them horizantly there would be diffrent dimmentions and since it cant fall you could stackr them diagnally as well so no matter what you do there is no one right answer.
Rukia5889 7 months ago
20+10+5+2.5+1.25=38.75
insaneclownposse3212 7 months ago 2
@insaneclownposse3212 there are more than just 5 dolls :P
ChristianVido 7 months ago 4
It's 40ft. Or more accurately infininitely close to 40ft.
You start out 20ft away from 40 ft.
the next doll gets you halfway tehre
10 ft away from 40
the next doll gets you haldway tehre
5 feet away from forty
the next doll gets you halfway there
2.5 feet away from forty
and so forth.
SayNoobB4ULeave 7 months ago
20 ft.
MegaMVP555 8 months ago
I would glue them on top of eachother! :D
getylaso153 8 months ago
in meters?
supercuber 8 months ago
the answer is probobly around 38.00 to 39.00 because 1.25 is the only whole number so you wont get any more than the actually whole number so if you were to go infinite you would probobly end up around 40.0 because their is only so many decimals you can add to a whole number
TheHollywood1177 8 months ago
it is50 feet tall exactly
MegaGhost987 8 months ago
Its a gp with initial term 20 and common ratio0.5 sum = a/1-r=40 simple.
ManavSandhu21 8 months ago
the answer is infinity because each one has a height and you have infinite dolls and anything times infinity is infinity. EASY! also, i'm a fifth grader and i figured this out!
DavidNancyTom 8 months ago
@DavidNancyTom you are wrong. the most it could ever reach is 39.9 reoccuring. im in 4th grade and i figured this out.
ProjectZEEEUUUSS 8 months ago
It depends which is the lower doll. If the lower doll was 0.15625, then the height would be 39.84375!
SuperSuperstarMario 8 months ago 2
he said the dolls went on forever so my answer is................... 10 duuuuuuuuuuuuhhhhhhhhhhhhhhhhh
123naitsabes 8 months ago
2o
rockstarlexibug2000 8 months ago
Infinite becoz the dolls just keep on going
TheSaskiaX 8 months ago
You can make the stack as tall as you can reach. Whether that be standing height, or height achieved by using a ladder etc.
Mahtayoo 8 months ago
52.5!!!!!!!!!!!!!!!!!!!!!!! AM I RIGHT?!?!?!!?!?
clearsky7up 9 months ago
coes half 20 is 10 and half 10 is 5
Ade26682 9 months ago
It would be 20 feet tall becuase every doll can fit into 1. I DONT GET THIS CRAP!!!!!
tiabee33 9 months ago
@tiabee33 You are stacking all the dolls on top of eachother. Of course, the 10 foot doll can fit inside the 20 foot doll, but as soon as you stack them, you get a stack which is 30 feet tall (which already surpasses 20 feet). Now, take the 5 foot doll and stack it on top, then the 2.5 foot doll.. ect. The question is, how tall can you make the stack?
ChristianVido 9 months ago
20 feet?
ViennaSteeler 9 months ago
as tall as you want. its infinite, !
CamBen24 9 months ago
OMG!!! easy u stack them inside each other!!!
HYPERCRAZYGAMER 9 months ago
A NUMBER!
gamergirlz11 9 months ago
Um.... well.
Presumably forever?
MrMyerst 9 months ago
Until you reach space...Then you'll sufficate
lazercoffee 9 months ago
7 dolls
39.5 feet
RolfBrecht123 9 months ago
it would be tall
HardRocker12341 9 months ago
@Wa133D95 It says that the stack will never fall, so you dont have to worry about glue :)
ChristianVido 9 months ago 2
never more than 20 ft tall, cause you would spend eternity taking each doll out of the other, if you had infinite amount of dolls, and nobody would care enough to try!!! :p
morgieipadio 9 months ago
20 ft tall
Penguinesefb 9 months ago
20ft! You put all the dolls in the first doll then make it stand up
iLiLWolfie 9 months ago
yeah it converges to a limit of 40
Razieldude9 9 months ago
infininte number of dolls so it can be infinite duh
glennyboy500 9 months ago
@glennyboy500
Go back to secondary school..
ronaldwangdra1995 9 months ago
20 feet tall duh
Jacob19d 10 months ago
that is the world's medium test
princesss3707 10 months ago
the possiblilty is endless. It will never stop. (unless it does, which it isn't)
DNWARRIORZ 10 months ago
well there is nothing half the size of zero so technically theere is
nimriv2 10 months ago
@nimriv2 the first part is true, but if you are dividing by 2 each time, you will never get to zero... the number will just get infinitely small :D
YouAintSeenMyBallz 9 months ago
@YouAintSeenMyBallz your kinda right i didnt think that through and nice riddle by the way ;))
nimriv2 9 months ago
@nimriv2 haha :D
YouAintSeenMyBallz 9 months ago
it says clearly they get stacked on top of each other. Its' a converging series, each term adding half the previous one, so it can never exceed 40 feet. The answer is 39.9 recurring feet.
paul1010hotmailcom 10 months ago
as long as the universe
McAppleWar 10 months ago
20 ft russiAN dolls stack
SHORTREAPER117 10 months ago
I downloaded this song using the YouTube Converter for free :D lovin the song! :D
MeganRyanXx 10 months ago
@MeganRyanXx Awesome! I'm glad you like it! :D
ChristianVido 10 months ago
What's the song name?
thezonelistener 10 months ago
@thezonelistener It's called "Heaven" and it was made by me. If you want, you can inbox me your email address and I can email it to you for free :D
ChristianVido 10 months ago
@ChristianVido thanks! but next time you should sell it on amazon mp3 or iTunes, because that's a pretty good song!
thezonelistener 10 months ago
ALL OF YOU ARE IDIOTS ITS 20 FEET BECAUSE YOU STACK THEM INSIDE EACHOTHER BLOODY HELL IT AINT HARD!
WingWeeMovies 10 months ago
20 feet, you stack them inside eachother
dawnofthedonuts 10 months ago 2
@dawnofthedonuts haha, that's pretty clever! i did say "if you stack them all on top of eachother" though.. still, a pretty crafty answer! :D
ChristianVido 10 months ago
@ChristianVido so then..... whats the answer?
dawnofthedonuts 10 months ago
@dawnofthedonuts i'll give everyone a hint. the answer is in the comments, but i won't say which one(s) contain it. :D
ChristianVido 10 months ago
ínfinite
JustRoozz 10 months ago
easy ... the dolls height always gets divided by 2 -> there are infinite dolls cause you can divide every number (no matter how small it is) divide by 2
so the height would be infinite
S3iF3 10 months ago
easy ... infnite
S3iF3 10 months ago
20ft ? (:
Rhianneeeee 10 months ago
Almost 40 feet. The more you stack the close you get to 40 feet but you never reach 40 feet.
markus031098 10 months ago 31
Infinite as you have an infinite number of dolls.
K0xGH0STZz 10 months ago 47
@K0xGH0STZz No dude. Read about the Geometric series.
kourosh89 8 months ago
i love that ridle
wolf56244 8 months ago
@K0xGH0STZz No it's not infinite, you mayhave infinite dolls but they are constantly shrinking away from the goal of 40 feet and you will never reach 40 feet.
TheAstroSteve 6 months ago