Question : Directions: Which of the following four options will replace the question mark (?) in the following series?
149, ?, 114, 89, 59, 24
Option 1: 129
Option 2: 140
Option 3: 139
Option 4: 134
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Correct Answer: 134
Solution :
Given:
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
So, the missing number is 134. Hence, the fourth option is correct.
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