Sun Tzu Suan Ching/Examples/Example 3

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Example of Problem from Sun Tzu Suan Ching

There are $3$ sisters, of whom the eldest comes home once every $5$ days,
the middle every $4$ days,
and the youngest in every $3$ days.
In how many days will all the $3$ meet together?


$60$ days.


The answer is found by:

$\map \lcm {4, 5, 3}$