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If (6,10,n,18) are consecutive terms of an arithmetic progression, what is (n)?

Answer and explanation

Correct answer: (14)

In an arithmetic progression, the common difference is the same between every pair of consecutive terms. The first two terms here are 6 and 10, so \(d=10-6=4\). The third term is obtained by adding this difference to the second term: \(n=10+4=14\). The fourth term then becomes \(14+4=18\), which confirms that the sequence is consistent.

Therefore \(n=14\), so option D is correct. Another way to see this is that the middle term of four consecutive terms is equally spaced: the terms move from 6 to 10, then to 14, and then to 18. The values 12, 13, and 15 do not preserve the same difference throughout the progression.

Related tags

ApMissing TermConsecutive TermsMedium

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