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In the sequence (25, 21, 17, 13, ...), which term is 21?

Answer and explanation

Correct answer: Second term

The position of a term is counted from the beginning of the sequence. Here, 25 is the first term, 21 follows it, so 21 is the second term. The common difference is -4, confirming that the displayed order is 25, 21, 17, 13. Therefore, option B is correct; options A, C and D identify the positions of 25, 17 and 13 respectively.

Related tags

Arithmetic ProgressionTerm PositionClass 10 MathematicsIntroduction To Aps And Common Difference.Introduction To Aps And Common DifferenceArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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