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What will be the 24th term of the AP 18, 22, 26, 30, ...?

Answer and explanation

Correct answer: 110

For an arithmetic progression, the nth term is given by aₙ = a + (n − 1)d. Here a = 18 and d = 22 − 18 = 4. Substituting n = 24 gives a₂₄ = 18 + (24 − 1)×4 = 18 + 23×4 = 18 + 92 = 110. Therefore option B is correct. The multiplier is 23 because the first term is counted as the starting value and only 23 equal increases are needed to reach the 24th term. Option A results from using too few increments, option C from using one extra increment, and option D does not reflect the sequence's steady increase. The answer can also be checked by adding 4 successively from the first term.

Related tags

Arithmetic ProgressionNth TermPositive DifferenceFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)Arithmetic Progressions ApMathematics

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