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What is the common difference of the sequence (36,42,48,54,\ldots)?

Answer and explanation

Correct answer: (6)

The direct answer is option C, 6. The common difference is the difference between consecutive terms, calculated as next term minus previous term. Using the first two terms, \(d=42-36=6\). Check the next pairs: \(48-42=6\) and \(54-48=6\), so the difference is constant and the answer is confirmed. Option A, 4, is not the gap between 36 and 42. Option B, 5, is also not obtained from subtraction. Option C, 6, matches every consecutive pair and is correct. Option D, 12, is twice the actual difference and may result from an incorrect operation or combining gaps. Memory cue: in an AP, subtract neighbouring terms and verify with another pair.

Related tags

Arithmetic-ProgressionCommon-DifferenceClass10

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