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project_euler_question_1__2 by Kermitdude 

sum = 0
for i in (1..999)
  if i % 3 == 0 || i % 5 == 0
  sum += i
  end
end
alert "The answer to the first\n Project Euler Question is\n" + sum.to_s

x, y, sum = 1, 1, 0
while sum < 4_000_000
  sum += (x + y)
  x, y = x + 2*y, 2*x + 3*y
end
alert "The answer to the second\nProject Euler Question is\n" + sum.to_s