In Liar, Truth-teller, Random-Answerer Riddle, a traveler can ask two questions to decide which is the safe path out of two. What to ask?
4 Prisoners and Hats Puzzle: Alien chief offered a game of freedom or death to his 4 prisoners. Each will wear a hat and guess its color. Can anyone win?
How many addition signs should be put between digits of 987654321 to equal 99? Where should they be placed? Time to solve 10 minutes.
Cherry in the glass puzzle: Move 3 matchsticks to take the cherry out of wine glass. Second puzzle is harder: Move 2 matchsticks to take the cherry out.
Two daily life examples of application of Other way round inventive principle are highlighted. One of the two is analyzed in detail to arrive at the inventive solution just by Question, analysis, answer technique without applying any inventive principle directly.
Goal is to show how a common person can reach an inventive solution without being aware of inventive principle used and thus become conscious about the inventive possibilities...
9 squares puzzle: Find area of rectangle with 9 gradually smaller squares inside it and the side length of smallest square 3 units. Time 30 minutes.
Transform the negative forces around you in a difficult situation to positive resources and inventively achieve what all thought to be impossible otherwise. Adapt in your own way the concrete steps elaborated to do this...
Surely you can solve the 3 digit number puzzle in 20 mins if you approach the puzzle with systematic problem solving techniques.
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.
