+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 15 of 20

You can view the page at http://forums.pinstack.com/content.p...his-problem...... Smartphone News forum

  1. #1
    Delfim's Avatar
    Delfim no está en línea Stack Moderator
    Join Date
    Mar 2007
    PIN/ID
    Nope!
    Posts
    14,886

    Article: Calling on PS Brainiacs: Solve This Problem...

    Advertisement




  2. #2
    catstide's Avatar
    catstide no está en línea Stack Professional
    Join Date
    May 2008
    PIN/ID
    wut?
    Posts
    6,673
    47

  3. #3
    Delfim's Avatar
    Delfim no está en línea Stack Moderator
    Join Date
    Mar 2007
    PIN/ID
    Nope!
    Posts
    14,886
    Geez that's quick. How can we be sure your answer is correct Cats ? Or ain't ya tellin' ?

  4. #4
    jfcooley's Avatar
    jfcooley no está en línea Stack Professional
    Join Date
    Oct 2008
    Posts
    7,479
    6Race 5 horses, takes 5 races to race them all and get 5 winners. Race the winners in a final and the one that wins is the fastest.

  5. #5
    smooth10's Avatar
    smooth10 no está en línea Stack level 5
    Join Date
    Feb 2008
    PIN/ID
    21CB9337
    Posts
    1,506
    2

    That was simple! Race the 5 heats in 5 different locations, and then have the winners race in 1 last run

  6. #6
    srl7741's Avatar
    srl7741 no está en línea Stack Professional
    Join Date
    May 2006
    PIN/ID
    Retired
    Posts
    6,359
    6

  7. #7
    Join Date
    Jul 2008
    PIN/ID
    Apple
    Posts
    1,749
    24

  8. #8
    jfcooley's Avatar
    jfcooley no está en línea Stack Professional
    Join Date
    Oct 2008
    Posts
    7,479
    Answer: 7 Races (if you are comparing times, still say 5 if you just wanna know the horse that can beat all the others.)

    First race all 25 horses in groups of 5 to figure out the top 3 in each group (which will leave 15 horses). Call them:

    A1 B1 C1 D1 E1 A2 B2 C2 D2 E2 A3 B3 C3 D3 E3

    Here, A1 is faster than A2. A2 is faster than A3. The same applies for the rest of the groups.

    Now race A1, B1 C1 D1 E1

    Lets say the order of the horses according to ranking was A1, B1,C1,D1,E1

    So A1 is No 1.

    Now A1 is faster than B1 and B1 is faster than C1. So we can get rid of the entire D and E groups. 9 horse remain.

    Also, A1 is faster than B1 and B1 is faster than C1. So we can get rid of C2 and C3. Now 7 horses remain.

    A1 is faster than B1. B1 is faster than B2. Get rid of B3, and 6 horses remain.

    Out of these, we know A1 is the fastest. So now race A2, A3, B1,B2,C1 to figure out No 2 and No 3 positions.

  9. #9
    Join Date
    Jul 2008
    PIN/ID
    Apple
    Posts
    1,749
    24

  10. #10
    Delfim's Avatar
    Delfim no está en línea Stack Moderator
    Join Date
    Mar 2007
    PIN/ID
    Nope!
    Posts
    14,886
    Heck Jay, you've given me a headache. In todays market the Chinese are the biggest, the best and the fastest. Hell bells, just look for a horse with slanted eyes. There is your answer.

  11. #11
    jfcooley's Avatar
    jfcooley no está en línea Stack Professional
    Join Date
    Oct 2008
    Posts
    7,479
    LOL. Google helped me cheat.

  12. #12
    Join Date
    Jul 2008
    PIN/ID
    Apple
    Posts
    1,749
    I looked it up too although I still don't see how only 7 races can get the fastest horse. Don't know. They say the answer is 7.

  13. #13
    Delfim's Avatar
    Delfim no está en línea Stack Moderator
    Join Date
    Mar 2007
    PIN/ID
    Nope!
    Posts
    14,886
    ^^^ Chinese jockey!

  14. #14
    Join Date
    Jul 2008
    PIN/ID
    Apple
    Posts
    1,749
    Damn Chinese.

  15. #15
    Capdot's Avatar
    Capdot no está en línea Stack level 5
    Join Date
    Sep 2007
    Posts
    1,958
    They say 7 races because they are looking for the fastest and the top 3. The OP asked to find the fastest horse so the 7th race would be redundant since it wasn't asking for the top 3 just the fastest. So 6 races it is.

+ Reply to Thread
Page 1 of 2 12 LastLast

Posting Permissions

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