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.
15, 23, 31, 39, ?, 55, 63
Option 1: 47
Option 2: 46
Option 3: 44
Option 4: 45
Correct Answer: 47
Solution :
Given:
15, 23, 31, 39, ?, 55, 63
Add 8 to the numbers of the given series –
15 + 8 = 23; 23 + 8 = 31; 31 + 8 = 39; 39 + 8 = 47; 47 + 8 = 55; 55 + 8 = 63
So, the missing number is 47. Hence, the first option is correct.
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