Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 115, 130, 122, 137, 129, ?
Option 1: 144
Option 2: 142
Option 3: 148
Option 4: 150
Correct Answer: 144
Solution : Given: 115, 130, 122, 137, 129, ?
Add 15 and subtract 8 alternately from the previous term to obtain the missing term. 115 + 15 = 130; 130 – 8 = 122; 122 + 15 = 137; 137 – 8 = 129; 129 + 15 = 144
So, 144 is the missing term in the given series. Hence, the first option is correct.
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