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In a fair (1485) tickets are sold in (18) days. If the sale increases by (5) tickets each day then how many tickets were sold on the first day?

Answer and explanation

Correct answer: (40)

Using (S_{18}=1485) and (d=5) gives (a=40). Exam tip: solve the sum formula backward to find the first term.

Related tags

ApWord-ProblemTicketsFirst-TermWord Problems Based On ApsArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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