Verbal Reasoning - Mental Ability Questions

In a certain code language, “RAPID” is written as “GLSDU”. How is “WATER” written in that code language?

Find the odd word/letters/number pair from the given alternatives

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

7 x 10 ÷ 30 - 2 + 6 = ?

In a certain code language, “MOTOR” is written as “ORXTX”. How is “GUARD” 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?
a_b_a_c_a_bc

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

Troposphere, Stratosphere, Mesosphere, ?

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

? , YV, BY, FC

MATHEMATICS is related to NUMBERS in the same way HISTORY is related to