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Class 10MathematicsArithmetic Progressions (AP)Word problems based on APsMedium
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A staircase has (52) bricks in the bottom row and (4) fewer bricks in each upper row. How many bricks are there in (10) rows?

Answer and explanation

Correct answer: (340)

This is the decreasing AP (52,48,44,\ldots) and (S_{10}=340). Exam tip: treat the decrease as a negative common difference.

Related tags

ApWord-ProblemDecreasingWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematicsClass 10 Mcq
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