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What will be the next term in the sequence (4,10,18,28,40,\ldots)?

Answer and explanation

Correct answer: 54

The differences between consecutive terms are 10−4=6, 18−10=8, 28−18=10, and 40−28=12. These differences increase by 2 each time, so the next difference is 14. Hence, the next term is 40+14=54. Choosing 52 would give a difference of only 12 and would break the pattern of increasing differences. Exam tip: Write the consecutive differences first to identify the pattern in a sequence.

Related tags

SequencesNumber PatternsSuccessive DifferencesNext TermClass 9 MathematicsSequences And ProgressionsMathematicsClass 9 Mcq

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