Question : Directions: In the following question a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
3, 5, 9, 15, 23, 33, 45, 59, ?
Option 1: 81
Option 2: 60
Option 3: 75
Option 4: 72
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Correct Answer: 75
Solution :
Given:
3, 5, 9, 15, 23, 33, 45, 59, ?
Add the successive multiples of 2 to the given term to obtain the next term.
3 + 2 = 5; 5 + 4 = 9; 9 + 6 = 15; 15 + 8 = 23; 23 + 10 = 33; 33 + 12 = 45; 45 + 14 = 59; 59 + 16 = 75
So, the required term is 75. Hence, the third option is correct.
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