having 27 balls one ball is less weight.all are looking similar.with simple balance find minimum number of times we need to weigh to know which ball is less weight??

• ans-4
  13 13 1 =27 ,weight 13 and 13 and put 1 apart.
  6 6 1 =13
  3 3 =6
  1 1 1 =3
  step1=>take 13 13 ball and weight if both have same weight then remaining ball will be less weight ball. if not then take lower weight of 13 ball;
  and divide it into 6 6 1.
  step 2=>take 6 6 ball and weight if both have same weight then remaining ball will be less weight ball. if not then take lower weight of 6 ball;
  and divide it into 3 3
  take 3 3 ball and weight if both have same weight then remaining ball will be less weight ball. if not then take lower weight of 3 ball;
  and divide it into 1 1 1.
  and weight any two 1's if both same then third one is low weight .
  
• 10 years agoHelpfull: Yes(2) No(0)
• ans is 1
  because,
  for minimum no of time,
  if we take the two balls and check weight,
  we can get less weight ball at first time.
  
• 10 years agoHelpfull: Yes(0) No(0)
• sorry,
  ans is 2
  because,
  for minimum no of time,
  if we take the two balls and check weight,
  we can get less weight ball at first time.
  so we have measure the weight for 2 ball.
  
• 10 years agoHelpfull: Yes(0) No(0)