Question : Directions: Which of the following numbers will replace the question mark(?) in the given series?
25, 42, 61, 82, ?, 130
Option 1: 115
Option 2: 105
Option 3: 108
Option 4: 112
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Correct Answer: 105
Solution :
Given:
25, 42, 61, 82, ?, 130
In the above-given series, subtract consecutive odd numbers from the previous number to obtain the next number.
25 + 17 = 42; 42 + 19 = 61; 61 + 21 = 82; 82 + 23 = 105; 105 + 25 = 130
So, 105 is the missing number of the series. Hence, the second option is correct.
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