Solution of buckets and tank problem

This online calculator find a solution to the question how to fill tank with certain amount of water using two buckets of different size

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I've seen this problem in 4th grade exersize book: fill the tank with 4 liters of water using 3-liter and 5-liter buckets.
We could employ computer and solve it using brute force approach - by checking all available variants. Here is the calculator.

PLANETCALC, Solution of buckets and tank problem

Solution of buckets and tank problem

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