Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 15, 23, 19, 20, 23, 17, 27, 14, 31, 11, ?
Option 1: 35
Option 2: 15
Option 3: 19
Option 4: 32
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Correct Answer: 35
Solution : Given: 15, 23, 19, 20, 23, 17, 27, 14, 31, 11, ?
The pattern is as follows – Odd position numbers – 15, 19, 23, 27, 31, ?→15 + 4 = 19; 19 + 4 = 23; 23 + 4 = 27; 27 + 4 = 31; 31 + 4 = 35 Even position numbers – 23, 20, 17, 14, 11→23 – 3 = 20; 20 – 3 = 17; 17 – 3 = 14; 14 – 3 = 11
So, the missing number of the series is 35. Hence, the first option is correct.
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