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 There are 34 balls.In that 33 balls are weighs 5kg each, and one ball weighs 4 kg.Then find minimum number of weighs to found that faulty ball(4kg ball)? a)2 b)3 c)4 d)5 Recent SYNTEL question..... answer plzzzzzzzzz Asked by tejaCompile Program
 teja   Dnt knw dude... 7 years ago
 uttam kumar barik   syntel result was announced 7 years ago
 manish   c will b d ans step 1: group 34 balls into 2 ..say a and b...where both a and b contain 17 balls each...now measure and find d lighter grp..letz say it as a step2: now divide d 17 balls of group a into 3....say as c d and e..where c and d contains 8 balls each and e contains 1 ball...now measure c and d..if both r equal then ball in grp e is lightest....end...if both r not equal then goto next step. step3: now lets say...c is d lighter group...then divide 8 balls in c into 3 grps....i=3,j=3,k=2..measure i and j..if i and j are equal then any 1 ball in grp k is lighter...measure 1-1 ball frm k..nd find d lightest one...so 4 weighings r required. if they r not equal say ith is lighter than jth...that means lighter ball is in ith grp...so measure 1-1 ball frm ith if equal then 3rd ball frm ith grp is lighter or if they r not equal...then either of them r equal..so all 2gthr maximum 4 weighings r required in any case. 7 years ago
 VIGNESH.R   how to see the syntel result? 7 years ago
 teja   results will sent to your college T.P.O sir within 72 hours from the time of exam... 7 years ago
 VIGNESH.R   ok k.. 7 years ago
 TAPASH PAUL   5 WILL BE 7 years ago
 Alok Jaiswal   Ans, (C) 4 in worst case Manish is right. 7 years ago
 Amitabh   Ans (c) as it goes in the power of 3^4=81 as 34 is greater than 27 so we have to take 81 divide the entire balls in the multiple of 3 which leaves 1 ball. Now we take weight of first two group if they are equal then defected ball is in remaining ones else it is in the the side of minimum weight side of balance and so on... 7 years ago
 viprav   min means d bst case which can b as 17 vs 17 whch provided d fault grp thn 8 vs 8 n 1 alone n bst case means 8vs 8 is balanced. so ans can b 2 7 years ago
 bharath   hai friends any one through syntel written test 7 years ago
 bharath   hai friends any one through out syntel written test 7 years ago
 Akshay Srivastav   I think its 4 7 years ago
 vilas   dude 1st write the question correctly. Improve ur english... 6 years ago
 vilas   If u need the min. no. of balls required, then the answer is 'a' 6 years ago
 amit prasad   c is the ans in any case... divide the balls into 3 parts -(11,11,12) now compare (11,11) n keep 12 outside now after 1st balance we came to know which one contains the odd ball now if its 12 then make pair(4,4,4) n if its 11 make pair(4,4,3) n compare (4,4) if 3 contains the odd ball we get our result in 3 then we able identify odd ball in 3 steps but if the odd ball is in 4 then make pair (1,1,2) n then after if 1 case when the odd ball lies in 2 we have to make one more comparision (1,1) so max 4 weighs required in worst case so ans is c 6 years ago
 Ashutosh Das   it's c 6 years ago
 Rohit Kumar Singh   c 6 years ago
 kamruddin ansari   a) 2 explanation: 1. put 17 balls on each pan of scale which pan lift up take those ball out. 2. now again put 8 balls out of 17 balls on each pan of scale if both pan balance the ball in your hand will b the 4 kg . have a nice day..... 6 years ago
 shubham   min 2 and max 5 times 5 years ago
 rohit   4 5 years ago
 kapila   4 4 years ago
 mohit   4 4 years ago
 vaibhav   c 3 years ago
 satish   ans is b....divide the 8 8 8 8 2 then doo 3 years ago