Verbal Reasoning - Mental Ability Questions

The following equation is incorrect. Which two signs should be interchanged to correct the equation? 15 x 12 + 40 ÷ 40 - 6 = 21

There is certain relationship between two given words on one side of : : and one word is given on another side of : : while another word is to be found from the given alternatives, having the same relation with this word as the given pair has. Select the best alternatives/ relationship.

Contamination : Food :: Infection : ?

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

ABC, BDF, DHL, ?

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
FK27, LQ64, RW125, ?

A man is engaged for planting trees for 10 hours. He plants 10 trees in an hour. He takes rest for 30 minutes after every hour. How many trees does he plant in 10 hours?

If OUTLINE is coded as QWVNKPG, then how will MAN be coded as?

If A's sister's husband is B's mother-in-law's son-in-law, how is A related to B?

Determine which of the given conclusions logically follows from the given statements, disregarding commonly known facts.

Statements:
Some actors are singers.
All the singers are dancers.

Conclusions:
(i) Some actors are dancers.
(ii) No singer is an actor.