Verbal Reasoning - Mental Ability Questions

What does it mean to calculate frequencies within a dataset? 

A series is given with one term missing. Select the correct alternative from the given ones that will complete the series.
ACE, FHJ, KMO, ?

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

Looking at a portrait, Advaita said, " Anirudh is the father of my grandmother's daughter's niece. My grandfather had only two kids". How is Anirudh related to Advaita?

Choose the correct alternative which will complete the series. ACT, EGG, INK, ___

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

In the following question, select the missing number from the given series.
3, 4, 5, 4, 9, 10, 6, 16, 15, 9, 25, 20, 13, 36, ?

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?