Challenge #18 Stumper You are in the local super market looking at boxes of cereal. You look carefully at the printed information on the boxes and notice that Blue Puffs are 50% more expensive than Yellow Crisps and contain 20% less weight than Green Flakes. The box of Green Flakes is 50% heavier than the Yellow Crisps but costs 25% more than Blue Puffs. You like all three cereals (!) but have to be economical this week so which cereal do you buy ? Stumper Answer: Blue Puffs and Green Flakes are of equal value but Yellow Crisps is 20% more economical so you should buy Yellow Crisps this week - enjoy! Correct answer received from: TEEWYE, Flipper (youth), Daniel M. (youth), Jason Coffer