Point (m,n) is on the circle represented by m^2+n^2=10, and m, n are integers. How many such points are possible?	Choose the correct choice
A) 0 B) 2 C) 4 D) 6 E) 8
m^2+n^2=10 and m, n are integers means that 10 is the sum of two perfect squares.   10 is the sum of only one pair of perfect squares 1 and 9.   So, there can be 8 such points, 4 in each quadrant:   (1, 3);   (1, -3);   (-1, 3);   (-1, -3);   (3, 1);   (3, -1);   (-3, 1);   (-3, -1).   Answer: 8.
<result>E</result>
Point (m,n) is on the circle represented by m^2+n^2=10, and m, n are integers. How many such points are possible?