Verbal Reasoning - Mental Ability Questions

If 6#30=5; 8#24=3; 7#28=4; then what is the value of 8#40=?

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

Inch, Decameter, Foot, ?

Find the next in this series:
YC3, XF6, WI9, ........

In the following question, select the related letters from the given alternatives.
KLMN : IJKL : : TUVW : ?

If 8 θ 12 δ 6 = 60 and 13 θ 15 δ 11 = 74, then 18 θ 21 δ 15 = ?

Rajiv is the brother of Arun. Sonia is the sister of Sunil. Arun is the son of Sonia. How is Rajiv related to Sunil?

In the following question, select the related word pair from the given alternatives.
Canada : Ottawa : : ? : ?

Each of the following questions hasfour statements. Three are logically correct. Some of which may look factually absurd. Ignore this absurdity and look to the logical corrections. Choose the statement which is wrong or doubtful: