View All num of num See all Photos Microsoft This employer has taken extra steps to respond to reviews and provide job seekers with accurate company information, photos, and reviews. Interested for your company?Learn More. www.microsoft.com Employer Engaged Overview Reviews Salaries Interviews Jobs Photos Benefits 9.2k Reviews 32k Salaries 4.0k Interviews Follow Add Review or Salary Follow Add Review or Salary Interview Question Finance Intern Interview Microsoft You are given nine balls, one of which weighs less than the rest. You are also given a traditional two-sided scale. How many times do you need to weigh balls to determine which is the lightest one? Tags: See more , See less 8 Answer Add Tags Answer Interview Answer 1 Answer ▲ 1 ▼ 2 weighingsSeperate balls into 3 groups of 3. Put a group of 3 on each 1/2 of the scale. If the scale balances, the the light ball is in the 3rd group. If they don't balance, then you know the ball is in the 'light' group.Clear the scales and put one ball from the light group on each side of the scales. If the balance, then it's the 3rd ball. JG on Jan 17, 2013 Add Answers or Comments To comment on this, Sign In or Sign Up.