Verbal Reasoning - Mental Ability Questions

In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.

18 ÷ 12 - 5 + 30 x 6 = ?

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

DW, FY, HA, JC, ?

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

6,11,21,36,56,?

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

From the given alternatives, select the word which CANNOT be formed using the letters of the given word.

Grandmother

In the following question, select the odd word from the given alternatives.

Raja, Komal, Rupal, Sneha and Tarun are sitting in a line facing south. Raja and Komal are sitting together. Rupal is sitting at west end and Sneha is sitting at east end. Tarun is neighbour of Komal and Rupal. Who is sitting in the middle?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
122, 197, 290, ?