Verbal Reasoning - Mental Ability Questions

If X's mother is the only daughter of Y's father, then Y's husband 's father is X's ___.

If 40@8 = -5, 30@3 = -10 and 20@5 = -4, then find the value of 60@3 = ?

In the following question, select the missing number from the given series.
1, 3, 6, 11, 18, ?

Identify the diagram that best represents the relationship among the given classes.
Country, State, City

If D = 4 DESK = 39 ,then the value of DRAW is

If "S" denotes "multiplied by", "V" denotes "subtracted from", "M" denotes "added to" and "L" denotes "divided by", then

5 V 9 M 63 L 9 S 7 = ?

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

Jupiter, ? , Uranus, Neptune

A series is given, with one word missing. Choose the correct alternative from the given ones that will complete the series.
Oxygen, Toil, Arouse, Arson, Tenuous, ?