asked 139k views
5 votes
Suppose 13-years and 17-year, anc cicadas both appear this year. When will both typed of cicadas next appear together?

asked
User Jpiasetz
by
8.1k points

1 Answer

5 votes

Well, the least common multiple of 13 and 17 is 221.

The 17th next appearance of the 13-year cicadas,
and the 13th next appearance of the 17-year ones,
will occur in 221 years from now.

answered
User Pnichols
by
8.2k points
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