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Class 9 Mathematics Sequences and Progressions Arithmetic ProgressionEasy

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If (7,,\Box,,21,28,\ldots) is an arithmetic progression, what term fills the blank?

Answer and explanation

Correct answer: (14)

The difference between (21) and (28) is (7), so the missing term is (21-7=14). In exams, apply the difference backward too.

Related tags

Sequences Progressions Arithmetic-Progression Class-9 Easy Arithmetic Progression Sequences And Progressions Mathematics

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