diff --git a/.learn b/.learn
old mode 100644
new mode 100755
diff --git a/.rspec b/.rspec
old mode 100644
new mode 100755
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
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new mode 100755
diff --git a/LICENSE.md b/LICENSE.md
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new mode 100755
diff --git a/README.md b/README.md
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new mode 100755
diff --git a/lib/a_division_by_zero_error.rb b/lib/a_division_by_zero_error.rb
old mode 100644
new mode 100755
index fa27ef3..a7d7abd
--- a/lib/a_division_by_zero_error.rb
+++ b/lib/a_division_by_zero_error.rb
@@ -1,3 +1,3 @@
 42 / 6
 
-42 / 0
+# 42 / 0
diff --git a/lib/a_name_error.rb b/lib/a_name_error.rb
old mode 100644
new mode 100755
index bad266d..1871a77
--- a/lib/a_name_error.rb
+++ b/lib/a_name_error.rb
@@ -1,3 +1,5 @@
 "hello world"
 
-hello_world
+hello_world = "hello world"
+
+puts hello_world
diff --git a/lib/a_syntax_error.rb b/lib/a_syntax_error.rb
old mode 100644
new mode 100755
index 5252c8f..c91f2a8
--- a/lib/a_syntax_error.rb
+++ b/lib/a_syntax_error.rb
@@ -1,3 +1,5 @@
 x = 1
 
-x = 
+x = x + x
+
+puts x
diff --git a/lib/a_type_error.rb b/lib/a_type_error.rb
old mode 100644
new mode 100755
index 1217fd5..1689537
--- a/lib/a_type_error.rb
+++ b/lib/a_type_error.rb
@@ -1,3 +1,5 @@
-1 + 1
+x = 1 + 1
 
-1 + "is the loneliest number"
+y = 1 + x
+
+puts y+x
diff --git a/spec/no_ruby_errors_spec.rb b/spec/no_ruby_errors_spec.rb
old mode 100644
new mode 100755
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
old mode 100644
new mode 100755