Question

Natural numbers starting with 1 are written one after another like 123456789011, find the \(10^4\)th digit from left.

More generally find a closed form for the nth digit from left.

Answer 1

10^n-1

Answer 2

argh umm can you explain a bit mate?

Answer 3

nothing to be explained it's plain wrong.

Answer 4

i think it should be 10^n

Answer 5

wrong oh okay i need to think again then

Answer 6

how 10^n ishaan the answer is a single digit.

Answer 7

hmm for my understanding of the question

0123456789111213...99100101....

is it right?

100 for 1100
i think i might not be getting the question

Answer 8

123456789111213141516

The 20 th digit is \( 1\), 21'st is \(6\) ..

Answer 9

oh digit sorry i thought the whole number uhh i was getting it wrong all the time

Answer 10

yep the digit only.

Answer 11

btw this one is hard, and precisely the closed form.

Answer 12

9 1 digit
90 2 digit
900 3 digit
9000 4 digit
90000 5digit
9 + 180 + 2700= 7389
7389 + 4 * x = 10000
answer=3

Answer 13

sorry answer=5

Answer 14

answer is not 3 or 5 (definitely)

Answer 15

10001 digit is 3

Answer 16

How can u say i have given u proof

Answer 17

I understand that multiples of 10 are not on the list?

Answer 18

I trust my optimize algorithm more than your analysis :)

Answer 19

wats that ok tell me answer

Answer 20

NO!

Answer 21

I will, if Ishaan wants

Answer 22

He doesn't!

Answer 23

He was sad on an earlier occasion when I gave away the answer :P

Answer 24

No umm i don't wanna know the answer

Answer 25

For sry:

10001 digit = 10000 digit

Answer 26

I don't agree

Answer 27

Wat;s this

Answer 28

I've got 6?

Answer 29

I am sorry Mr.Math.

Answer 30

lol, so am I!

Answer 31

no problem.

Answer 32

uhh this is too much for my poor brain... :-/

foolformath you can tell the answer, i am off now, i will come online as soon as i get the nth form

Answer 33

the answer is 7. Closed form is not a nice one btw.

Answer 34

I was hoping you would come up with something cool :D