Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
17, ?, 35, 53, 77, 107
Option 1: 25
Option 2: 21
Option 3: 23
Option 4: 28
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Correct Answer: 23
Solution :
Given:
17, ?, 35, 53, 77, 107
In the above-given series, add the multiples of 6 to the previous number to get the next number.
17 + 6 = 23; 23 + 12 = 35; 35 + 18 = 53; 53 + 24 = 77; 77 + 30 = 107
So, 23 is the missing number of the series. Hence, the third option is correct.
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