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What is the last term in the AP of positive multiples of (19) less than (1500)?

Answer and explanation

Correct answer: 1482

The positive multiples of 19 form the AP \(19, 38, 57, \ldots\). For the last term, \(19n<1500\). Since \(1500\div19\approx78.94\), the greatest integer value of \(n\) is 78. Thus, the last term is \(19\times78=1482\). Although \(1501=19\times79\), it is greater than 1500. Exam tip: for “less than,” take the integer part of the quotient and verify the multiple.

Related tags

Arithmetic ProgressionPositive MultiplesNth TermInequalitiesClass 10 MathematicsFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

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