If x and y are integers such that x > y, which of the following CANNOT be a positive integer?
I. y(y – x)
II. y(x – y)
III. (x - y)/(y - x)  Choose the correct answer:	A) I only	B) II only	C) III only	D) I and II only	E) II and III only
lets see the three equations..   I. y(y – x)   if both x and y are negative number, y will be -ive and y-x, as numeric value of y will be more than x,will also be -ive... so out   II. y(x – y)   if both x and y are +ive number, y will be +ive and x-y will also be positive... so out   III. (x - y)/(y - x)   either one of the numerator and denominator will be -ive and the other +ive..   so will always be -ive   we need not see any further after checking for II as all choices except C are eliminated..   ANSWER:III only
<result>C</result>
If x and y are integers such that x > y, which of the following CANNOT be a positive integer?
I. y(y – x)
II. y(x – y)
III. (x - y)/(y - x)