diff --git a/day10/input.small b/day10/input.small
new file mode 100644
index 0000000..ec4a03f
--- /dev/null
+++ b/day10/input.small
@@ -0,0 +1,11 @@
+16
+10
+15
+5
+1
+11
+7
+19
+6
+12
+4
diff --git a/day10/solution1.rb b/day10/solution1.rb
new file mode 100755
index 0000000..aa76dc4
--- /dev/null
+++ b/day10/solution1.rb
@@ -0,0 +1,11 @@
+#!/bin/env ruby
+require 'pry'
+numbers = File.read('./input').split("\n").map(&:to_i).sort
+
+solution = numbers.map.with_index do |num, i|
+    next if i == 0
+    num - numbers[i-1]
+end
+#binding.pry
+final = [solution.count(1)+1, solution.count(3)+1]
+pp final, final.reduce(&:*)
\ No newline at end of file