The sum of the squares of the first 15 positive
integers (1^2 + 2^2 + 3^2 + . . . + 15^2)
is equal to 1240. What is the sum of the squares of the second 15
positive integers (16^2 + 17^2 + 18^2 + . . . +
30^2) ?

1) 2480
2) 3490
3) 6785
4) 8215