Question

It takes 1629 digits to number the pages of a book. How many pages does the book have?

Answer 1

1629/2

Answer 2

846 pages

Answer 3

I think it shud be 579. I got this, can someine confirm.

Answer 4

how did you get 579?

Answer 5

From page #1 to page # 9, there are 9 pages

From page #10 to page # 99, there are 90 pages. However, since each page number has 2 digits, there are 180 digits from page # 10 to page # 99

From page #100 to page # 999, there are 900 pages. However, since each page number has 3 digits, there are 2700 digits from page # 100 to page # 999

Since there are 1629 digits, we know so far that number of pages is less than 900

Now, we need to find out how many digits there are for those pages greater than 99 or those pages with 3 digits

Since there are 189 digits for pages with less than 3 digits, we can subtract 189 from 1629 digits to find the number of pages with 3 digits

1629 − 189 = 1440

1440 represents the pages with 3 digits, so number of pages with 3 digits = 1440/3 = 480

Thus, total number of pages = 480 + 90 + 9 = 579 pages

Answer 6

um... i think that you are over-thinking this....

Answer 7

it would just be divided by 2... right?

Answer 8

hes correct

Answer 9

who is correct?

Answer 10

Adil.

Answer 11

joe did u teach karate?

Answer 12

ok, well then i guess I was wrong

Answer 13

or at least the reasoning is, im going to try and verify.

Answer 14

or self defense?

Answer 15

You don't number the first page(s) of a book... perhaps it's a 580 ;P

Answer 16

joe?

Answer 17

AdilAshraf is correct.

Answer 18

Basically the question is asking, if you write down the natural numbers as such:

1234567891011121314151617...

and you go to the 1629th digit, what number do you end on?

Answer 19

joe could u please go to chat im math?

Answer 20

i dont teach karate unfortunately =/

Answer 21

well u look like my teacher...
for self defense. did u teach that?

Answer 22

not at all =/

Answer 23

hmm do you you have a twin?

Answer 24

You refering to the 'self defense wis jo' ? Those youtubes are awesome xD

Answer 25

Nope no twin that i know of.

Answer 26

lol "that I know of"

Answer 27

wow. my teacher was named joe too and ur pic looks just like him!

Answer 28

well there are always people that look like other people out there. I dont want to claim "im the only person that looks like me ever!" lol

Answer 29

wow this is justt crazy