Verbal Reasoning - Mental Ability Questions

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

P_P_RPQ_S_Q_ST

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

1.5, 9/4, 3, ? , 4.5, 21/4

A has more money than E but less of that than B. C has more money than D but less of that than E. Who among them is the richest?

If 'x' means '-', '-' means 'x', '+' means '/' and '/' means '+', then what is the value of 15 - 2 / 900 + 90 x 100?

If TABLE is written as 84973 and CHAIR is written as 51462, then how is TEACHER coded?

In the following question, select the related letters from the given alternatives.
JPSW : LQUX : : MRFT : ?

In the following question, select the related word from the given alternatives.
Bark : Dog : : ? : Sparrow

If "S" denotes "multiplied by", "P" denotes "subtracted from", "R" denotes "added to" and "Q" denotes "divided by", then 14641 Q 121 P 100 S 2 R 100 = ?