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The first row of an auditorium has 11 seats, and each succeeding row has 3 more seats than the previous row. What type of sequence is formed by the number of seats?

Answer and explanation

Correct answer: Arithmetic progression (AP)

This is an AP because the number of seats increases by the same fixed difference, 3, in every row; for example, 14−11=3. In a GP, consecutive terms have a constant ratio instead. Exam tip: subtract adjacent terms to identify an AP.

Related tags

Arithmetic ProgressionAp Word ProblemsCommon DifferenceSequence IdentificationClass 10 MathematicsWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions Ap

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