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01.03.2021 • 
Mathematics

There are periodical cicadas with a 13-year life cycle and other periodical cicadas with a 17-year life cycle. The ones with the 13-year life cycles become active adults every 13 years and the ones with 17-year life cycles become active adults every 17 years. Suppose that one year, both the 13-year and 17-year cicadas are active adults at the same time. Find the next three times (in terms of the number of years from now) that both kinds of cicadas will be active adults simultaneously.

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