lunedì, dicembre 20, 2004
:: exercise your brain ::You have 8 balls, 7 weigh the same and 1 weighs lighter than the rest. You have ONE balance scale. You are only allowed to weigh the balls TWICE. How can you identify the lighter ball just by using the balance scale twice?
contributed by ALESI - the one with the MANLY nick. *coff coff*
answers up after you guys try out the riddle... just leave it as a comment here.
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2 Comments:
This is EW who has nothing better to do... :)
1. Take 3 balls and weigh them against 3 balls (1st weighing).
Scenario 1:
If there is no weight difference, the lighter ball is either one of the remaining 2 balls. Just weigh them against one another (2nd weighing)to find out which ball is lighter.
Scenario 2:
If there is a weight difference, take the set which is lighter. Pick out 2 balls from this set and weigh them against each other (the 2nd weighing). If they are equal, the remaining ball is the light one. If not, obviously the lighter one is the one you are trying to find.
Correct? :)
YES sooo smart! hehe... and thanks for helping me blog it out! lolz... hey, turn on yr hp. i sent u a message!
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