## Airplane Riddle of Flying Around the World

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...

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Submitted by Atanu Chaudhuri on Mon, 26/04/2021 - 02:17

Submitted by Atanu Chaudhuri on Thu, 14/01/2021 - 23:47

How many addition signs should be put between digits of 987654321 to equal 99? Where should they be placed? Time to solve 10 minutes.

Submitted by Atanu Chaudhuri on Mon, 11/01/2021 - 23:54

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.

Submitted by Atanu Chaudhuri on Sun, 10/01/2021 - 22:10

Move 2 matches to make 6 squares and move 8 to make 6 squares. Total time to solve the pair of challenging matchstick puzzles is 20 minutes.

Submitted by Atanu Chaudhuri on Mon, 04/01/2021 - 23:58

Matchstick tower puzzle: Move 4 matches to invert the tower. This is a different type of matchstick puzzle that is challenging to solve in 20 minutes.

Submitted by Atanu Chaudhuri on Tue, 22/12/2020 - 23:37

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.

Submitted by Atanu Chaudhuri on Thu, 17/12/2020 - 23:30

Surely you can solve the 3 digit number puzzle in 20 mins if you approach the puzzle with systematic problem solving techniques.

Submitted by Atanu Chaudhuri on Wed, 16/12/2020 - 23:52

Find area of equilateral triangle if side length of smallest of 3 squares inscribed in the triangle on top of each other is 1. It needs a bit of math.

Submitted by Atanu Chaudhuri on Sat, 05/12/2020 - 01:45

What is in 2012th position of PROBLEMSOLVINGPROBLEMSOLVING... continued indefinitely? To solve the repetition pattern riddle, find a rule in repetitions.

Submitted by Atanu Chaudhuri on Fri, 04/12/2020 - 21:08

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.