Verbal Reasoning - Mental Ability Questions

If "P" denotes "multiplied by", "R" denotes "subtracted from", "S" denotes "added to" and "Q" denotes "divided by", then 6 P 7 S 169 Q 13 R 5 = ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. AB, GH, MN, ST, ?

Aman is 4 years older to Bimal. Bimal is 2 years younger to Chaman. Chaman is 6 years older to Dhruv. Dhruv is 9 years younger to Esha. Who is the second eldest?

In the following question, select the related number from the given alternatives.
243 : 819 : : 163 : ?

Select the related word/letters/number from the given alternatives.
EFGH: LNPR : : ABCD : ?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series. TP, UQ, WS, ZV, ?

Choose the related word/letters/number from the given alternatives. 19 : 6859 : : 21 : ?

In the following question, select the missing number from the given series.
1, 3, 6, 10, 15, ?