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. 22, 31, 42, 55, ?, 87
Option 1: 64
Option 2: 70
Option 3: 72
Option 4: 68
Correct Answer: 70
Solution : Given: 22, 31, 42, 55, ?, 87
Add consecutive odd numbers in increasing order starting from 9 to the previous term to obtain the next term in the series – 22 + 9 = 31; 31 + 11 = 42; 42 + 13 = 55; 55 + 15 = 70; 70 + 17 = 87
So, 70 is the missing term in the series. Hence, the second option is correct.
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