What is the value of Y?

$I. x^2-y^2=5$

II. x and y are each positive integer

If n > 0 is 20% of n greater than 10% of the sum of n and 0.5?

I. n < 0.1
II. n > 0.01

If r, s, and t are positive integers and rst = 343, that is the value of t?

I. r < S < t
II. rs = 7

If n is a positive integer, is an odd?

I. 3n is odd
II. (n + 3) is even

If a, b, and c are integers, is 2a - b + c greater than a - b - 2c?
I. a is positive
II. c is positive

If x + y = 6 then what does x - y equal ?

I. $x^2-y^2=12$

II. 2y + x = 8

If y is an odd integer and the product of x and y equals 222, what is the value of x?

I. x is a prime number
II. y is a 3 digit number