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Rows of stairs use (8,11,14,17,\ldots) bricks. What is the common difference of this arrangement?

Answer and explanation

Correct answer: 3

To find the common difference, subtract consecutive terms: 11 - 8 = 3 and 14 - 11 = 3. Since each successive row has 3 more bricks, the common difference is 3. Here, 8 is the first term, not the common difference. Exam tip: In an AP, common difference = second term − first term.

Related tags

Arithmetic ProgressionCommon DifferenceClass 10 MathematicsSequenceAp BasicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)

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