diff --git a/solutions/elixir/sum-of-multiples/1/lib/sum_of_multiples.ex b/solutions/elixir/sum-of-multiples/1/lib/sum_of_multiples.ex
new file mode 100644
index 0000000..0d82106
--- /dev/null
+++ b/solutions/elixir/sum-of-multiples/1/lib/sum_of_multiples.ex
@@ -0,0 +1,18 @@
+defmodule SumOfMultiples do
+  @doc """
+  Adds up all numbers from 1 to a given end number that are multiples of the factors provided.
+  """
+  @spec to(non_neg_integer, [non_neg_integer]) :: non_neg_integer
+  def to(limit, factors), do: gen_score(factors, limit - 1)
+
+  defp gen_score(scores \\ [], factors, limit)
+  defp gen_score(scores, [], _), do: scores |> MapSet.new() |> Enum.sum()
+  defp gen_score(scores, [0 | tail], max), do: gen_score([0 | scores], tail, max)
+  defp gen_score(scores, [factor | tail], max) do
+    factor
+    |> Range.new(max, factor)
+    |> Range.to_list()
+    |> Kernel.++(scores)
+    |> gen_score(tail, max)
+  end
+end