Verbal Reasoning - Mental Ability Questions

Which set of letters when sequentially placed at the gaps in the given letter series shall complete it?
J_J_L_KL_JK_MN

Choose the related word/letters/number from the given alternatives.
Nest : Bird : : Den : ?

A has more money than E but less of that than B. C has more money than D but less of that than E. Who among them is the richest?

If 4!4 = 80, 3!8 = 110 and 6!2 = 80, then find the value of 7!9 = ?

Pointing at X, Y says, "X is the son of the only son of my mother". Then Y is X's ___.

Find the missing numbers from the given alternatives

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

200, 100, 50, 25, 12.5, 6.25, ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

13,25,49,85, ?