In the given question, a letter-number series is given with one term missing as shown by (?). Choose the missing term out of the given alternatives.
2, P, 9, Q, 6, R, 13, S, 10, T, ?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 17
The series is made of two series written alternately: the letters P, Q, R, S, T in alphabetical order, and the numbers in between. The missing term comes after T, so it is the next number.
Numbers: 2, 9, 6, 13, 10, ?
Differences: \(+7, -3, +7, -3\), so the pattern is add 7, subtract 3 in turn
Next step is \(+7\): \(10+7=\) 17