Verbal Reasoning - Mental Ability Questions

In a certain code language, "BISLERI" is written as "IREBISL". How is "PANTHER" written in that code language?

In the following question, which one set of letters when sequentially placed at the gaps in the given letter series shall complete it?

X_ZX_YY_ZX_Z

Select the missing number from the given responses:

In the following question, select the missing number from the given series.146, 137, 128, ?, 110, 101

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 word/letters/number from the given alternatives.
MUMBAI: UMBMIA :: GURUGRAM : ?

Pointing towards a girl, Rajan said, she is the daughter of my mother's daughter. Then how is the girl related to Rajan?

If a = x, b = / and c = +, find the value of 7a5c1b6