Verbal Reasoning - Mental Ability Questions

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
XIIIII, IXIIII, IIXIII, IIIXII,IIIIXI, ?

Select the related letters from the given alternatives.
WUS : DFH :: MKI : ?

Find the next number in the given series. 9, 11, 15, 17, 21, 23, ?

If 70$7 = -10, 50$5 = -10 and 40$8 = -5, then find the value of 10$2 = ?

In the following question, select the related letter/letters from the given alternatives.

CPR : ERT : : DQS : ?

Selecttherelatedword/letters/numbersfromthegivenalternatives: Sanitation:Illness::Care:?

Johnny's father is the brother­in­law of Nisha's only sister. How is Johnny related to Nisha?

Five girls are sitting facing towards the north. Rekha is between Shalini and Neetu. Pooja is to the immediate right of Neetu and Shalini is to the immediate right of Neha. Who is sitting in the middle?