wip 41

src/solutions/41.rb

@@ -0,0 +1,20 @@
+# 9 digits, probably starts with 9; ends with 1,3,7
+require 'prime'
+
+def pandigital?(n)
+  unique_digits = (n.abs).digits.uniq.reject{ | d | d == 0 }
+  puts(unique_digits.inspect)
+  unique_digits.length == 9
+end
+
+def n41
+  (-987654321..-912345687).select do |n|
+    pandigital?(n)
+  end.find do |p|
+    p.abs.prime?
+  end
+end
+
+puts ?* * 100
+puts n41
+puts ?* * 100

src/test/41_util_test.rb

@@ -0,0 +1,9 @@
+require './test/test_helper'
+require './41_util'
+
+class FortyOneUtilTest < Minitest::Test
+  def test_digit
+  end
+
+
+end