What is the absolute difference between the sum of the first 10 positive multiples of 5 and the sum of the first 10 positive, even integers?
(5, 10, 15, 20, 25, 30, 35, 40, 45, 50)==275 - multiples of 5
(2, 4, 6, 8, 10, 12, 14, 16, 18, 20) ==110 - first 10 even numbers.
abs[275 - 110] ==165
