View All num of num See all Photos J.P. Morgan www.jpmorganchase.com Engaged Employer Overview Reviews Salaries Interviews Jobs Photos Benefits 5.1k Reviews 14k Salaries 2.8k Interviews 5.1k Jobs Follow Add Review or Salary Follow Add Review or Salary Interview Question Analyst Interview(Student Candidate) London, England (UK) J.P. Morgan puzzle 9 balls, identical in appearance. 8 are of same weight. 1 is heavier. Identify this heavier ball by using a scale twice. Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 5 Answers ▲ 3 ▼ put 9 balls in groups of 3. Interview Candidate on Apr 3, 2011 ▲ 0 ▼ Split them into two sets of 4 and 1 individual ball. Place the two sets on each side of the balance. If the sets balance out, then the individual ball is the heavier one. If the sets don't balance, then take the heavier set and split it up into two sets of two and repeat. Anonymous on Apr 9, 2011 ▲ 1 ▼ I believe that an explanation to the solution that Interview Candidate is suggesting can be found here:http://brainteaserbible.com/snooker-balls-weighing-scales sqr23 on Apr 15, 2011 ▲ 6 ▼ Split the balls into groups of three, compare two of the groups. If the sets balance then the heavy ball is in the third group, otherwise it is in the group left out. Whichever it is, take two balls from that group to weigh. If they balance, you know it is the third ball, if they don't, you have the heavier ball. Anonymous on May 31, 2011 ▲ 0 ▼ http://brainteaserbible.com/snooker-balls-weighing-scales an87 on Jun 13, 2011 Interviews > Analyst > J.P. Morgan Add Answers or Comments To comment on this, Sign In or Sign Up.