Verbal Reasoning - Mental Ability Questions

Select the related word/letters/number from the given alternatives. 58531 : 11 : : 78363 : ?

In a row of books a book of English is 16th from left end of row. A book of Mathematics is 12th from the right end. If the Mathematics book is 6th to the right of the English book, then how many total books are in the row?

Introducing a man, Amar says, "His wife is the only daughter of my maternal grandfather". How is the man related to Amar?

Introducing a boy Ankit said," He is the son of daughter of my grandfather's son". How is that boy related to Ankit?

Nishi's grandfather is the brother of Om's father. Hemant is the son of Om. How is Hemant related to Nishi?

If 1∆-5=5, 4∆7=-28 and -1∆-3=-3, then find the value of 8∆-8 =?

Find the odd word/letters/number pair from the given alternatives.
(A) Violin
(B) Piano
(C) Flute
(D) Harmonium

In a code language, AILMENT is written as 1923540. What is the code for DISEASE?