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Class 9 Mathematics Sequences and Progressions Arithmetic ProgressionEasy

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What is the missing term in the arithmetic progression (3,\Box,15,21,\ldots)?

Answer and explanation

Correct answer: (9)

The difference between (15) and (21) is (6), so the missing term is (15-6=9). In exams, apply the common difference backward too.

Related tags

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

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