Hmmm anyone who could solve the following :) -- " You are given 5 bags. There are 10 beads in each of the bags. In 4 of the bags, the beads each weigh 10kg. Remaining bag, each bead weighs only 9kg. All bags & beads look identical. Which bag has the lighter beads? Remember, bags and all the beads look identical. You can use a scale, but it has to be a 1-tray scale, not a 2-tray balance scale. Also, you may use the scale only once. Which bag has the lighter beads? " Just kidding. Would be an honour to meet and know anyone who is willing to do likewise.