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Number Series: 8, 13, 8, 7, 8 , ? , ?
Difficulty Level

What numbers comes next in this series?

8, 13, 8, 7, 8, ?, ?

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Answer: 8, 13, 8, 7, 8, 7, 7
The series is the number of letters required to spell the regular shapes

(triangle, quadrilateral, pentagon, hexagon, heptagon, octagon, nonagon, ...)

(triangle(8), quadrilateral(13), pentagon(8), hexagon(7), heptagon(8), octagon(7), nonagon(7), ...)

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