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What is the 11th term of the series 1, 8, 15, ...?

Correct Answer: 71

Explanation:

This is an AP with a = 1 and d = 7
∴ 11th term = a + (n - 1) x d = 1 + (11 - 1) x 7
= 1 + 10 x 7 = 71


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