The Weighing of Balls

The Weighing of Balls: You have 8 balls identical in size and appearance but 1 is heavier than the others, all of which weigh the same. You have a balance scale that can compare the weight of any two groups of balls. What's the minimum number of weighings needed to find the heavier ball?

Answer: Two weighings. First, weigh 3 balls against 3 others. If th…