
Sign up to save your podcasts
Or
You are given 8 identical-looking balls, but one of them weighs slightly less or slightly more than the others. You have a balance scale to determine which ball is different, and you can use it only twice. What is the minimum number of weighings needed to find the odd ball and determine whether it weighs less or more?
You are given 8 identical-looking balls, but one of them weighs slightly less or slightly more than the others. You have a balance scale to determine which ball is different, and you can use it only twice. What is the minimum number of weighings needed to find the odd ball and determine whether it weighs less or more?