What is it that was given to you, that still belongs to you, that you have never lent to anyone, but that is used by all the people you know? (from the Logic Puzzles book by the Diagram Group)
Submit your answer on our Family Puzzle Marathon site. Solve three puzzles and get a prize!
See TheMathMom presentation:
Popular Puzzles
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This is an easy puzzle that you all are welcome to share with your kids and friends: Put addition signs between the digits 88888888 to get ...
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This puzzle arrived via email from one of the fans. Can you move just one match to make this statement correct? There is more than one sol... -
Here is a number magic trick that came to me via mail. All of you, math detectives, are invited to unveil its magic with your logic. Tak... -
This came in a magic trick box that our daughter picked for her birthday. Exhausted from all the Bar Mitzvah preparations for her older b... -
This came from my son who got it from someone else at school. I solved it quickly and texted him the answer just as I was getting into ... -
Magic squares are tables of numbers where sums of every row, every column and both diagonals produce the same number. No, they were not in... -
My daughter's school teacher is showing kids some number mysticism. She told them to take any 3 digit number, e.g.793. Scramble its digi... -
We are done with the winter Olympics and now are looking forward to the Oscar's entertainment. As we saw in the previous puzzle , t... -
I found this puzzle in a tiny but mighty pocket puzzle book named Optical Illusions. Suppose the yellow billiard ball strikes the bumper a... -
You have 42 parrots and 7 cages of various sizes. Lock all the parrots inside the cages so that no cage is empty and each cage contains an ...
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