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In an auditorium, the first row has 20 seats and each successive row has 4 more seats than the previous row. Which statement about this sequence of seats is correct?

Answer and explanation

Correct answer: The difference between every two consecutive terms is 4.

The sequence is 20, 24, 28, ... . Since 24 − 20 = 4 and 28 − 24 = 4, the common difference is 4, so it is an AP. A constant ratio is a property of a GP, not an AP. Exam tip: check consecutive differences 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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