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The sequence (9,18,27,36,\ldots) consists of multiples of which number?

Answer and explanation

Correct answer: 9

The terms 9, 18, 27, and 36 can be written as \(9\times1\), \(9\times2\), \(9\times3\), and \(9\times4\), respectively. Therefore, every term is a multiple of 9. Although 3 is also a factor of all these terms, the sequence follows the pattern of consecutive multiples of 9; 6 is not a factor of 27. Exam tip: Write the terms as a common number multiplied by \(1,2,3,\ldots\) to identify the sequence pattern.

Related tags

SequencesArithmetic ProgressionMultiplesNumber PatternsClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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