Add new comment


Should be 2. Divide into groups of 3/3/2. Weigh 3 against 3. If equal, take the 2 and weigh one against the other to find heavier ball (2 weighings total). If not equal, pick the heavier group of 3 - weigh 1 against 1 and leave the other ball to one side. If equal, heavy ball is 1 not on scales. If not equal, you have found the heavier ball (2 weighings total)

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.