also contains four of these types of problems. Problems 1, 19, and 25 of the Moscow Papyrus are Aha problems. For instance, problem 19 asks one to calculate a quantity taken 1 1/2 times and added to 4 to make 10. In other words, in modern mathematical notation one is asked to solve .

Pefsu problems

Most of the problems are pefsu problems (see: Egyptian algebra): 10 of the 25 problems. A pefsu measures the strength of the beer made from a hekat of grain
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