In following question, a number series is given with one term missing. Choose the correct alternative that will same pattern and fill in the blank spaces. - Which term of the series 5, 8, 11, 14, … is 320 ?
Answer: C. 106th
Clearly, 5 + 3 = 8, 8 + 3 = 11, 11 + 3 = 14, .... So, the series is an A.P. in which a = 5 and d = 3. Let the nnumbers of terms be n. Then, 320 = 5 + (n - 1) * 3 or (n - 1) = 105 or n = 106.