Question
How O related to
Y? Answer the questions based on the information given below . There are six members A, O, C, L, J and Y in a family. O is the only child of sister of Y. C is the only daughter of A, who is married to O. Gender of A and J is same, L is a female and A has at least two children. J is not a female.Solution

Find the next term in the series:
4, 9, 19, 39, 79, ?
221, 100, 0, -81, ?
...√(10198 )× √(7220 )÷ 16.69 + 2010.375= ?
827, 820, 806, 785, 757, ?
7    8     ?     13     17     22    28
...76, 80, 89, 105, ?, 166
{(12√5 + 6√5 )} ×{(10√5 - 5√5 )} - 8² + 6² = ?
-1, 5, 23, 59, ?
12   18   31   51   ?   112
What will come in place of the question mark (?) in the following series?
17, 21, 30, 46, ?, 107