Modern Tic Tac Toe:

Using integers 1 through 9, arrange them on a tic tac toe board so that each row, column, and diagonal add up to 15

Conor Naughton | The Rock at Boston College


Bill Gates loves puzzles:

Every year Bill Gates holds a Clue-esque dinner where everyone participates in various mystery games/ puzzles (true story). This past year he invited 1000 guests and gave the following puzzle: “I have added a new room to my house and in it there are 1000 windows. I’d like the first participant to go and open all the windows. Then I’d like the second guest to go and close every second window. After, I’d like the third guest to go to every third window; if it is closed, open it, if it is open, close it. Continue this process (fourth person goes to every fourth, fifth goes to every fifth, etc.) until the 1000 guest has completed the task. At the end, how many windows will be open?”





Solutions to the Last puzzles:

Half poem half riddle: Tomorrow

Clock puzzle: 2 hours and 24 minutes has passed

Penny game: Stack 3/10 of the pennies with heads facing up

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