Page 11 of 17 FirstFirst ... 910111213 ... LastLast
Results 101 to 110 of 162

Thread: Puzzles for you

  1. #101
    Join Date
    Dec 2009
    Posts
    5

    Default

    Which puzzle do I solve?

  2. #102
    Join Date
    Dec 2009
    Posts
    5

    Default

    if we assume there is a 50-50% chance of having a girl or a boy then:

    so what is the chance that you have a girl first?

    50%, what is the chance you have a girl again? 50% and so on

    so:

    1 boy 50% chance
    1 boy + 1 girl 25% chance
    1 boy + 2 girl 12.5% chance
    1 boy + 3 girl 6.25% chance
    etc
    --------------------------
    Number of boys is:
    SUM as n goes from 1 to infinity of (0.5^n)
    Number of girls is:
    SUM as n goes from 1 to infinity of ((n-1)*0.5^(n+1))

    so the ratio is the ratio of those two values.

  3. #103
    Join Date
    Jan 2010
    Posts
    5

    Default

    cool stuff

  4. #104
    Join Date
    Jan 2010
    Posts
    8

    Default

    Quote Originally Posted by indianbaba View Post
    nice puzzle.
    Keep sharing.
    what is the correct answer?

  5. #105
    Join Date
    Jan 2010
    Posts
    1

    Default

    All those formulas are nice but this is a what came first the chicken or the egg. However many families you start with is all the families you have as their is a boy there already so no other children would be born.

  6. #106
    Join Date
    Feb 2010
    Posts
    5

    Default oh

    that sound is good

  7. #107
    Join Date
    Jul 2010
    Posts
    4

    Default

    Originally Posted by http://neerajsingh.bizhat
    Well the ages of the daughters are 8 years, 3 years and 3 years

    My approach:

    1- First factor 72 in three parts.

    2- Now we need to consider that one where the sum is something that is on the building.

    3- As the second mathmatician got confused, that means there are two factors whose sum equal the same. They are 8*3*3 and 2*6*6. Both equal to 14.

    4- Now he needed one more hint to chose one of them. So when the first mathmatician about her Eldest daughter, that means it can be only 8*3*3, because in other case, there is a draw.

    Hnce the answer. Thanks for posting the puzzle dear, what a nice way to start your posting in a forum.

    Wish you a very wonderful time here among us Bizhatians.

  8. #108
    Join Date
    Aug 2010
    Posts
    5

    Default

    nice dude 123123

  9. #109
    Join Date
    Sep 2010
    Posts
    3

    Default

    ok its cool

  10. #110
    Join Date
    Sep 2010
    Posts
    6

    Default

    nice and very good

Page 11 of 17 FirstFirst ... 910111213 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •