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Libra puzzle 13 October 05

Section: article

Categories: Mention

A gift for this day: a math puzzle.

You have a scale and 40 stones each weighing one kilo.
Using the scale, what is the minimum number of additional stones you need to weigh all of the 40 stones in all of their combinations (for example 3 stones, 38 stones, etc.), and what would these additional stones weigh?

That is really all the information you need to know, but to be nice I will mention as an example that the maximum number of additional stones required would of course be 40, each weighing one kilo. Also, this is not a trick, it is a math puzzle, and it requires some lateral thinking.

  • Title: Libra puzzle