Transfer a pile of 15 numbered discs from square A to square F on a board with 6 squares in minimum moves. Ensure: A disc can't be on a lower numbered disc.
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Half a poodle riddle: Once from her latest litter of French poodles, Sonia sold half of the litter and half a poodle to the local pet shop...read on...
A milkman has to deliver 1 quart of milk each to a 4 pint and a 5 pint jug from his two 10 gallon filled up milk cans. Time to solve 20 mins.
Peter and Paul are always lying and truth-telling twins. You ask one of them, "Is Paul the lying one?" And he answers, "Yes." Whom did you ask the question?
Airplane Riddle of Flying Around the World: One airport can be used by airplanes. An airplane carries enough fuel to fly halfway across the globe...
What is in 2012th position of PROBLEMSOLVINGPROBLEMSOLVING... continued indefinitely? To solve the repetition pattern riddle, find a rule in repetitions.
3 boxes puzzle: You have 3 boxes containing colored balls. All 3 boxes are wrongly labeled. Open only one box, pick one ball and correctly label the boxes.
Bridge Crossing Riddle: 4 persons to cross a bridge at night in 17 mins. Two persons can cross at a time with crossing speeds of each different. Read on...
Discover the critical information hidden in the two friends' conversation by systematic problem solving—a mix of exhaustive approach and reasoning.
Measure 4 liters of water with two empty jugs of 5 liter and 3 liter capacity and a tank full of water. Pour as many times as you want.