Which of the following four options will replace the question mark (?) in the following series?
149, ?, 114, 89, 59, 24
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 134.
Given series: 149, ?, 114, 89, 59, 24
Subtract multiples of 5 starting from the third multiple to get the next term:
149 - (5 × 3) = 149 - 15 = 134;
134 - (5 × 4) = 134 - 20 = 114;
114 - (5 × 5) = 114 - 25 = 89;
89 - (5 × 6) = 89 - 30 = 59;
59 - (5 × 7) = 59 - 35 = 24