Question : Directions: In the following question, select the missing number of the given series. 5, 9, 17, 33, 65, ?
Option 1: 140
Option 2: 130
Option 3: 129
Option 4: 128
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Correct Answer: 129
Solution : Given: 5, 9, 17, 33, 65, ?
In the above-given series, multiply the previous number by 2 and then subtract 2 from it to get the next number. (5 × 2) – 1 = 10 – 1 = 9 (9 × 2) – 1 = 18 – 1 = 17 (17 × 2) – 1 = 34 – 1 = 33 (33 × 2) – 1 = 66 – 1 = 65 (65 × 2) – 1 = 130 – 1 = 129
So, the missing number is 129. Hence, the third option is correct.
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