The given question consists of a set of statements. Find out whether the data provided in the statements are sufficient to answer the question and mark the option:

If x and y are both positive integers, then how much greater is x than y
$I.x+y=20$
$II.x=y^2$

If m and n are both positive integers, then how less is n than m?

I. m + n =20

II. m = n${}^2$

The given question consists of a set of statements. Find out whether the data provided in the statements are sufficient to answer the question and mark the option:

How many people are standing between X and Y in a row ?

Statement I: X is fifteenth from the left end of the row.
Statement II: Y is exactly in the middle and there are ten children standing to his right.

Will n be an integer?

I. 3n is an odd number.

II. 2n is an even number.

A, K, M and P are 4 friends. Who among them is the heaviest?

Statement I: P is heavier than M and K but lighter than A.

Statement II: M is lighter than P and A but heavier than K.