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Math brain teaser

  1. 12-31-2005 #1
    Umm_Maysa's Avatar Full Member
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    Math brain teaser

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    Ahmad is writing a book. He starts on page 1. When he finished, he uses a total of 228 digits.How many pages does he have?
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  3. 12-31-2005 #2
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    Re: Math brain teaser

    is it 228
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  4. 12-31-2005 #3
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    Re: Math brain teaser


    Nope. try again . Read carefully . It says 228 digits not 228 pages.
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  5. 12-31-2005 #4
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    Re: Math brain teaser

    184?? :d
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  7. 12-31-2005 #5
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    Re: Math brain teaser

    format_quote Originally Posted by muslimahh View Post
    184?? :d
    WAIT! hehe 121!!

    b.c. 9 (for page 1-9) = 9 pages
    PLUS 90 pages (to total 99) x2 (180)
    so thats 180+ 9 digits, i.e. 189 digits (we have 100 pages so far here)

    then 228 - 189 = 39

    39 divided by 3 (for the 3 digit numbers (100 onwards) = 13

    so 9 pages + 99 pages +13 pages = 121 pages!!!
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  8. 12-31-2005 #6
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    Re: Math brain teaser

    ergh sorry (no post editing, sorry for the million posts...trying to work this out

    9 + 90 (not 99 whoops) + 13 = 112!!!
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  9. 12-31-2005 #7
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    Re: Math brain teaser

    i got 106
    Math brain teaser

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  10. 12-31-2005 #8
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    Question Re: Math brain teaser

    Good 1 but i'm terible at maths....so u can't really expect the answer from me.

    Is it 28?
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  11. 01-01-2006 #9
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    Re: Math brain teaser

    format_quote Originally Posted by muslimahh View Post
    WAIT! hehe 121!!

    b.c. 9 (for page 1-9) = 9 pages
    PLUS 90 pages (to total 99) x2 (180)
    so thats 180+ 9 digits, i.e. 189 digits (we have 100 pages so far here)

    then 228 - 189 = 39

    39 divided by 3 (for the 3 digit numbers (100 onwards) = 13

    so 9 pages + 99 pages +13 pages = 121 pages!!!
    is THAT ([MOUSE]^^[/MOUSE]) suppose to be the brain teaser?! i dont understand a single thing u did!

    lets see.. if he has 228 digits of pages.. then his # of pages is in the 100 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000th number :confused:
    Last edited by Mainul_Islam; 01-01-2006 at 01:17 AM.
    Math brain teaser

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  13. 01-01-2006 #10
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    Re: Math brain teaser

    salam

    when the question says digits, exaclty what is it refering to??
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  14. 01-01-2006 #11
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    Re: Math brain teaser


    Sister Muslimahh got it right masha Allah.. digits means the unit example 100 means 3 digit, so pages 100-105 means 3 x 6=18 digits
    100, 101, 102,103,104,105
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  15. 01-01-2006 #12
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    Re: Math brain teaser

    asslamu alaikum i still don't get it where did u find this problem, never mind i am a history major not math
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  16. 01-01-2006 #13
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    Re: Math brain teaser

    wow... im impressed... some brains u got there!

    *claps*
    Math brain teaser

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  17. 01-01-2006 #14
    muslimahh's Avatar Full Member
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    Re: Math brain teaser

    hehe Alahdulillahi Rabb-Al-Alameen,

    JazakAllah bro Mainul_Islam,

    Simple logic alhamdulillah...I actually failed math like crazy in high school hehe, steered clear of it in undergrad....I thought it was ironic I actually got it right heheh,

    JazakAllah Khayr maysa for the brain teaser!! got anymore??
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  19. 01-01-2006 #15
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    Re: Math brain teaser

    format_quote Originally Posted by muslimahh View Post
    ergh sorry (no post editing, sorry for the million posts...trying to work this out

    9 + 90 (not 99 whoops) + 13 = 112!!!
    u are soooo clever im lost
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  20. 01-01-2006 #16
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    Re: Math brain teaser

    hmmmmmmmm........ok i lost 6 along the way i guess..........
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  21. 01-02-2006 #17
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    Re: Math brain teaser

    format_quote Originally Posted by zAk View Post
    i got 112 straight away !

    but u didnt say anything so too bad
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  22. 01-02-2006 #18
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    Re: Math brain teaser



    All this math hurts my brain... :confused:
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  23. 01-02-2006 #19
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    Re: Math brain teaser

    format_quote Originally Posted by hissa View Post


    All this math hurts my brain... :confused:
    too....much....to...handle!!!!

    my head is gonna explode!!! AAAHHH!!! :enough!:

    BOOM!
    Math brain teaser

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  25. 01-02-2006 #20
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    Re: Math brain teaser



    I don't get it!

    Math brain teaser

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