Thousand Power Thousand

Algebra Level 2

How many digits does the number 100 0 1000 1000^{ 1000 } have?

6 601 3000 1000 3001 1003

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29 solutions

Connor Hawley
Dec 15, 2014

For positive integer x x , any expression 1 0 x 10^{x} ,simplified, has x + 1 x+1 digits, e.g. 1 0 0 = 1 10^{0}=1 , 1 0 1 = 10 10^{1}=10 . Hence, 100 0 1000 = ( 1 0 3 ) 1000 = 1 0 3000 1000^{1000}=(10^{3})^{1000}=10^{3000} , so the simplified expression has 3000 + 1 = 3001 3000+1=3001 digits.

thats right.. 1 and the 3000 0s!

Muhammad Aimal Rehman - 5 years, 3 months ago

may you explain please why need to add one (1)...??

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because its 1000 so there is the one(1) on the left

Sagiv Mor - 5 years, 1 month ago

For counting the zero we need to add 1

sadhan saha - 5 years, 2 months ago

We add 1 bcoz there is one additional number 1 other than 0

Jaagrati Jain - 5 years ago

just do it

Rahul Mali - 2 years, 5 months ago

"Just do it" daw ano wala ka pala e

Christina Nunez - 11 months, 2 weeks ago

I believe all the other replied are wrong. We had 10 to the 3000 which means we still had one more 0 on that 10 so the 3000 of the power plus the 1 zero from the 10

Leonardo Noli - 3 weeks, 1 day ago

s, again 1000 log 1000= 3000 +1= 3001 good questions

Patience Patience - 5 years ago

I dunno man I count 8 didgits yall stooped af

Lukas Pohlman - 4 years, 11 months ago

How is it possible that 1=2?
Please tell me the solution im waiting

IBnay Asgher - 5 years ago

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a=b a^2=ab a^2-b^2=ab-b^2 (a-b)(a+b)=b(a-b) a+b=b 2=1

Hdjsj Jdjdj - 1 year, 2 months ago

log(1000^1000) = 1000log1000 = 1000×3 then the final answer be 3000

Andrew Ashraf - 5 years, 5 months ago

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ya they got me too...it did not say how many zero's ...it said how many digits. so you have a one and then the 3000 other digits.

Mary Moore-Padgett - 5 years, 4 months ago

Yes there are 3000 zeros but you forgot to count 1 as a digit so 3000 zeros + the digit 1 = 3001

Alessio Popovic - 5 years, 3 months ago

how it's not clear

Abhinandan Kumar - 4 years, 10 months ago

the same thing here!

Mohamed Mohamedy - 4 years, 10 months ago

great but still confused what happens with the ten

Charmi NAGAR [10R06M] - 4 years, 9 months ago

10^3 = 1000, which has 4 digits (1+ the value of the power). Similarly 10^6 = 1,000,000, which has 7 digits -- again 1+the value of the power.
So by extension, 1000^1000=(10^3)^1000. To evaluate this, multiply the "powers" together, as Connor has done, to get 10^3000, which by analogy with the above little examples, will have 3000+1 digits, = 3001 digits

Robert Nicol - 3 years, 8 months ago

Why add the 1?

A Former Brilliant Member - 2 years, 5 months ago

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1followed by 3000 zeroes would be 3001 digits.

Julia Sierra - 2 years ago

1000^1000=10^3(1000) =10^3000

10^2=100 --> 3 digits (2+1) 10^3=1000 --> 4 digits (3+1) Likewise

10^3000 --> 3001 digits (3000 + 1) so the answer is 3001

Senith B Gajanayake - 2 years ago

Brilliant idea!!

S 彭柏壬 - 11 months, 2 weeks ago

O thanks... For the help

Arunanshu Biswas - 4 years ago

This is according to the binomial theorem.

Muhammad Hammad Siddiqui - 5 years, 7 months ago

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10^x is not a binomial, it's a monomial binomial theorem would be more like (a+b)^x would have x+1 terms

Diana Azriel - 5 years, 6 months ago
Nikola Djuric
Dec 5, 2014

1000^1000=10^3000 and answer is 3001 becuase 10^x has x+1 digits 10²=100

fantastic logic.

Anik Saha - 4 years, 6 months ago
Robert Haywood
Dec 6, 2014

100 0 1000 = 1 1 0 3000 = 1 0 3000 1000^{1000}=1*10^{3000}=10^{3000} . This means there are 3,000 zeroes in the answer, however the part where it tricks you comes in when you need to realize that there is also a 1 at the beginning of the answer, therefore we get 3000 + 1 = 3001 3000+1=\boxed{3001} digits.

thanks robert sir,for your nice explanation....

Somnath Panda - 4 years, 8 months ago

Excellent one! =)

A Former Brilliant Member - 5 years, 2 months ago

I THINK THE ANS IS INFINITY.......😁

Chirag Mali - 4 years, 4 months ago

wait so where did he get the 3 from?

jorge garcia - 2 years, 5 months ago
Reineir Duran
Jan 9, 2015

That is really useful.

Nico Li - 5 years, 3 months ago

The best (idiots) guide

Carl Lewis - 4 years, 7 months ago

Duran gave the best answer

Athmanathan Seetharaman - 2 years, 5 months ago

simple $ sweet solution

azadali jivani - 2 years, 1 month ago
Vishal Kanhaiya
Dec 6, 2014

Guyz its just a pattern... we can make a formula to get the no. of digits in the solutions. It goes like this... the formula is x(n)+1 ... where "x" is the no. of zeroes in the base (limited to only 10,100,1000, etc of this type) and "n" is the exponent of the given number. this would give the total number of digits. Here, no. of zeroes=3 and exponent=1000, therefore, 3(1000)+1=3001 ... this is the answer...

Each time you multiply by 1000 you add 3 zeros, so you multiply 1000 times by 1000, then this is 3000 zeros, plus the number one in the beginning. This is 3000+1=3001

Hello, 100 0 1000 1000^{1000} can be expressed as ( 1 0 3 ) 1000 = 1 0 3000 (10^3)^{1000} = 10^{3000} . This number will look like this: 100000 000 100000\cdots 000 where there are exactly 3000 3000 zeroes. Thus, there are 3001 \boxed{3001} digits (including the 1 1 in front).

Excellent .... & Easy way of explanation...Any person can understand easily.

Ratan Shah - 4 years, 4 months ago

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I must this is the best way to explain the presence of 3000 zero but ironically people are still missing the really easier concept of adding a 1 to the left of these 0s to make it a number and raising the number of total 'digits' to 3001.

Zahid Hussain - 2 years ago

Simplified and concise explanation. Thanks for this!

Al Collado - 10 months, 3 weeks ago

You can simply use log in this types of problem to count digits of big exponents. Just calculate the 10 based logarithm for any other exponent like log(5^56) for calculating the digits of the number 5^56. For knowing details you can visit This Algorithm . But , in this case this algorithm is not effective because it is too big exponent to calculate.

Samwail Siddiqui
Oct 29, 2015

Let 1000^1000=x, taking log both side yhen finding x=10^3000. We have the solution as 10^a has always number of digits a+1 hence 3000+1=3001

Drew G
Dec 14, 2015

An efficient way to find the amount of digits D in an exponent is to use the formula D = floor(1 + (b)Log10(a)), which yields the result of 3001

This is the right way, forgotten by computer generation.

Pankaj Srivastava - 3 years, 8 months ago
Mohammad Khaza
Jun 24, 2017

1000^1=1000, 3zeroes,4digits

1000^2=1000000. 6zeroes,7 digits

1000^3=1000000000, 9zeroes,10 digits.

so,1000^1000 has=(3x1000+1)digits=3001 digits

Caroline Lui
Nov 14, 2015

Every time you multiply something by 1000, you add three zeroes. We're already at four from 1000^1, so for the other 999 thousands you add three more. 3x999 + 4 gives you 3001

Atul Singh
Jul 10, 2015

I am a big fan of simple solution to hairy looking problems .....so here goes 10^2 = 100 : 3 digits ( 2 zeros and 1) 100^2= 10000: 5 digits ( 4 zeros and 1) So you just have to calculate the number of zeros and increase it by one Number of zeros as can be seen by above examples = the numerical product of the power and the number of zeros in the base number So in 1000^1000 , number of zeros = 1000 x 3 ( no of zeros in the base number i.e. 1000) = 3000 and now add one to accommodate 1 So 3001 ....hope I have painted a picture

Did it the same way! Thumbs up! :)

Stevan Markovic - 5 years, 7 months ago
Mihir Rath
Jun 28, 2015

1000^1000=(10^3)^1000=10^3000. now 10^1 =2 digit 10^2=3 digit 10^3=4 digit 10^4= 5 digit that means 10^n contains (n+1) digits. so ,1000^1000 (=10^3000) will contain (3000+1=3001) digits

Raymond Fang
Jan 23, 2021

100 0 1 1000^1 has (1+3) digits. 100 0 2 \newline 1000^2 has (1+3*2) digits. So 100 0 1000 1000^{1000} has 1 + 3 1000 = 3001 1+3*1000 = 3001 digits.

Annie Li
Mar 20, 2017

go to https://www.quora.com/How-many-digits-are-in-1000-1000

Shaswat Singh
Jan 17, 2017

I don't know

Chan Ch
Aug 24, 2016

1000 have 4 digits, 1000^2 have 7, ..10, 13,... Number of digits of 1000^1000: 4 + 999*3 equal to 3001 digits

Nick Schot
Jul 21, 2016

What I did: It's (10^3)^(10^3) So that's 10^(3+3+3+3+3+... 10^3 times ) Therefore: 10^3000. Which is 3000+1 = 3001 digits. Since 10^x has x+1 digits.

Viki Zeta
Jun 7, 2016

No of terms in an exponential expression = ( l o g x ) + 1 (log x) + 1 , where x x is the exponential expression

So, here x = 100 0 1000 x = 1000^{1000}

No of terms = l o g ( 100 0 1000 ) + 1 = [ 1000 l o g ( 1000 ) ] + 1 = [ 1000 l o g ( 1 0 3 ) ] + 1 = [ 1000 3 l o g ( 10 ) ] + 1 = [ 1000 3 1 ] + 1 = 3000 + 1 = 30001 terms \text{No of terms} = log (1000^{1000}) + 1 = [1000 * log(1000)] + 1 \\ = [1000 * log(10^{3})] + 1 = [1000 * 3 * log (10)] + 1 = [1000 * 3 * 1] + 1 \\ = 3000 + 1 = 30001 \text{ terms}

Akash Dutta
May 16, 2016

Do it with logic it will be easy

See, 1000^1=1000 so if power is 1 there are 3 zeros similarly if power is 2 then zeros are 6

applying unitary method u get that if power is 1000 no of zeros is 3000 and there os a 1 in 1000 so no. Of digits is 3000+1

Anisha Mohapatra
Feb 22, 2016

10^1=10 so 1+1 THAT IS ONE IS THE NO. OF ZEROES THAT IS THE POWER AND REST 1 SO 1+1 SIMILARLY 1000^1000=(10^3)^1000 SO 3000 ZEROES AND 1 ONE SO 3000+1=30001

Refaat Hassan
Feb 18, 2016

Not the best solution but how i figured it out: 1000 = 4 digits 1000000 = 7 digits 1000000000 = 10 digits

you form a pattern starting at 4 then you add 3 digits for every subsequent power therefore 1000^1000 would be 4+3(999) = 3000-3+4 = 3001

Fauline St
Jan 18, 2016

( 1000 x 3 ) + 1

Dhananjay Pathak
Dec 31, 2015

(000+000....1000) times means 3*1000+1=3001

Erniel Boyose
Nov 13, 2015

10^1 has 2 digits, 10^3 has 4. 10^4 has 5,..., 10^x has (x+1) digits. 1000^1000 = 10^3(1000) = 10^3000. Therefore 1000^1000 has 3001 digits.

Akash Patalwanshi
Nov 12, 2015

Simple solution

(1000) 1 ^{1} = 1000 contains 3 zeros

(1000) 2 ^{2} = 1000000 contains 6 zeros

So (1000) 100 ^{100} contains 300 zeros

And (1000) 1000 ^{1000} contains 3000 zeros and so total digits are 3001.

Howard Squires
Nov 12, 2015

For each time you times it by 1000 you are adding 3 digits. You are adding 3 digits 1000 times therefore 3*1000=3000 plus the 1 at the start 30001

Rajibul Islam
Nov 2, 2015

There are 3 zeroes in the no. So simply multiply 3 with power of the no. i.e., 1000 Now 3×1000= 3000 so, 3000+ (1)= 3001 1 came from the first digit which is "1"

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