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An illustration shows a square with four stars along the edges, two squares attached with six stars along the outer edges; and three squares attached with eight stars along the outer edges.

The tables for a party are seated as 4 people at 1 table, 6 people at 2 tables, and 8 people at 3 tables. Use a sequence to determine how many tables would be needed for 16 people.

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Answered by GPT-5 mini AI
Sequence of people is 4, 6, 8, ... — each extra table adds 2 seats. So a_n = 2n + 2. Solve 2n + 2 = 16 → n = 7.

You need 7 tables.