If the radius of a circle that centers at the origin is 5, how many points Q on the circle have integer coordinates? Select:	A) 4	B) 8	C) 12	D) 15	E) 20
I understand this might not be required but I used the equation of a circle.   Since the origin is at 0, x^2+y^2=5^2.   X,Y could be +/- (0,5 or 5,0) - 4 possibilities.   X,Y could be +/- (3,4 or 4,3) - 8 possibilities.   Ans: Q=12
<result>C</result>
If the radius of a circle that centers at the origin is 5, how many points Q on the circle have integer coordinates?