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5 billion | 28 Jul 2009

Discussion in '$1 Daily Competition' started by shabbir, Jul 28, 2009.

  1. shabbir

    shabbir Administrator Staff Member

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    If you multiply together the number of fingers on every person's left-hands? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand) how long the number would be assuming 5 billion people on earth.
     
  2. Kshiteej

    Kshiteej New Member

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    0.
    It would only take one person to have no fingers on their left hand to make it zero as anything multiplied by 0 is 0.
     
  3. Kshiteej

    Kshiteej New Member

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    If all 5 billion people have 5 fingers on their left hand then the answer is 5^5 billion else answer will be 0 if any of this 5 billion people have no fingers on his/her left hand.
     
  4. mayjune

    mayjune New Member

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    Point 1 : In the above post, user has posted two answers in one post, using an If Else statement. So either the last answer in the post should be counted. Or it should be considered invalid, as this is not there in the rule - "only one answer per post."

    Point 2 : Question is not clear, 5 fingers per person for only who have thumb or otherwise?
     
  5. SaswatPadhi

    SaswatPadhi ~ Б0ЯИ Τ0 С0δЭ ~

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    The only assumption here is we have 5 billion ppl on earth.
    We don't know if we have exceptions like someone without fingers on left hand etc ..

    There can be a lot of cases like some 1 has 1 finger, 2 fingers, 3 fingers .. no fingers etc..
    And, I don't think it's possible to consider all of them.

    So.. i think the answer will be :

    The length of the number is
    = 5 billion * log(base 10) 5
    = 5 * 10^9 * 0.69897000433601880478626110527551
    = 3494850022 digits
     
  6. shabbir

    shabbir Administrator Staff Member

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    5 fingers are considered and not 4 fingers and 1 thumb.

    Many are close or I must say quite close but still no perfect answers.
     
  7. xpi0t0s

    xpi0t0s Mentor

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    Zero, because there is at least one person with a missing left hand.
     
  8. xpi0t0s

    xpi0t0s Mentor

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    So the answer is 1. because the length of the number zero is 1.

    Or if you just want the length of 5^5000000000, that's easy enough too, with a little help from logs and a calculator:
    5^5000000000=10^(log(5^5000000000))
    =10^(5000000000*log(5))
    5000000000*log(5)=3494850021.6800940239313055263775

    so the length of 5^5e9 is 3494850022
     
  9. shabbir

    shabbir Administrator Staff Member

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    Bingo
     
  10. SaswatPadhi

    SaswatPadhi ~ Б0ЯИ Τ0 С0δЭ ~

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    I thought we will end up with no current answer.
    'coz every1 answered 0, but shabbir needed the length.

    Congratz xpi0t0s. :happy:
     
  11. SaswatPadhi

    SaswatPadhi ~ Б0ЯИ Τ0 С0δЭ ~

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    lol .. i meant correct answer, but typed "current" somehow :rofl:
     
  12. mayjune

    mayjune New Member

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    nice one shabbir, you tricked us into it :)
     
  13. mayjune

    mayjune New Member

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    nice one shabbir, you tricked us into it :) congrats xp
     
  14. rik625

    rik625 New Member

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    Kis type ka question tha yeh yaar?? :crazy:
    ... Kuch samaj main nahi aaya :confused:

    LOL...Question to door ki baat hai..answer bhi bouncer gaya...LOL
     
  15. shabbir

    shabbir Administrator Staff Member

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    Please use English as medium of communication.
     
  16. mayjune

    mayjune New Member

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    LOL, what is the length of this string ?
    "HELLO"

    5 right?

    So what is the length of string 0?
    1
    Hence the answer is 1!
    :D

    why number of fingers = 0?
    Cause one of them will have no fingers in left hand, hence anything multiplied by 0 is = 0.
    Length of 0 = 1
    Hence Ans = 1
     
  17. rik625

    rik625 New Member

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    Allright Shabir...My aplogies.

    mayjune..thanks for explaining..I think if i read it more than times..I would surely get it... :)
     
  18. mayjune

    mayjune New Member

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    No problem.. :)
     
  19. shabbir

    shabbir Administrator Staff Member

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    Its fine and still you could not get the logic and answer or what ?
     

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