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What will be the next term in (30,27,24,21,\ldots)?

Answer and explanation

Correct answer: 18

The common difference is the difference between consecutive terms: \(27-30=-3\), \(24-27=-3\), and \(21-24=-3\). Therefore, the next term is \(21+(-3)=18\). Option 19 is incorrect because it would give a difference of \(-2\), whereas the sequence decreases by 3 each time. Exam tip: identify the common difference first, then add it to the last given term.

Related tags

Arithmetic ProgressionNext TermCommon DifferenceClass 10Introduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)Arithmetic Progressions Ap

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