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 = ?

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

Find the missing term in the following question:-

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

NC, OE, PG, QI, ?

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

XT, YU, BX, GC, ?

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

ijk, mno, lmn, pqr, opq,?

If the signs + and / and the numbers 2 and 4 are interchanged, which one of the following four equations would be correct?

If CABINET = EIACBTN, then COMPUTE = ____.