Verbal Reasoning - Mental Ability Questions

Select the related word/letters/numbers from the given alternatives: DBCE : QOPR :: JLKI : ?

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

In the following question, from the given alternative words, select the word which cannot be formed using the letters of the given word.
Biological

From point A, Ram moves 100m in north ­east direction, he again turns and moves 100m in south­east direction. He again turns and covers 100m south-west and finally covers 100m in north­ west direction. In which direction is he now with respect to A?

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

5 ÷ 4 ­ 10 + 7 x 16 = ?

In a certain code language, if COTTON is coded as 325526 and WOOLEN is coded as 122976, then TOWEL will be coded as?

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

Select the missing letter from the given responses?