Results 1 to 3 of 3
  1. #1
    5 Star Lounger Ruff_Hi's Avatar
    Join Date
    Feb 2001
    Location
    New York, New York, USA
    Posts
    768
    Thanks
    0
    Thanked 0 Times in 0 Posts

    How many open Lockers

    There are 100 students all in a line. There are also 100 lockers - all in a line and all shut. The first student walks down the line of lockers opening the lockers. The second student goes down the line of lockers closing every second locker. The third student goes down the line of lockers changing the status of every third locker (closing it if it is open, opening it if it is shut). The fourth student goes down the line of lockers changing the status of every fourth locker. etc etc etc until the 100th student goes down the line of lockers and changes the status of the 100th locker.

    At the end of all this - how many lockers are open?
    (Location Australia, then UK, but now USA. Heart, outlook, attitude, etc always Australian)
    Quote: "All Happiness is the release of internal pressure"

  2. #2
    WS Lounge VIP sdckapr's Avatar
    Join Date
    Jul 2002
    Location
    Pittsburgh, Pennsylvania, USA
    Posts
    11,225
    Thanks
    14
    Thanked 342 Times in 335 Posts

    Re: How many open Lockers

    I get <span style="background-color: #FFFF00; color: #000000; font-weight: bold"><font color=yellow>10, the squares of the first 10 numbers:
    1,4,9,16,25,36,49,64,81,100</font color=yellow></span hi>

    Steve

  3. #3
    5 Star Lounger Ruff_Hi's Avatar
    Join Date
    Feb 2001
    Location
    New York, New York, USA
    Posts
    768
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: How many open Lockers

    Yup
    (Location Australia, then UK, but now USA. Heart, outlook, attitude, etc always Australian)
    Quote: "All Happiness is the release of internal pressure"

Posting Permissions

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