Remove arithmetic koans

lib/koans/01_equalities.ex

@@ -5,6 +5,10 @@ defmodule Equalities do
     assert true == :__
   end
 
+  koan "Not something is the opposite of it" do
+    assert !true == :__
+  end
+
   koan "To understand reality, we must compare our expectations against reality" do
     assert 2 == 1 + :__
   end
@@ -13,11 +17,15 @@ defmodule Equalities do
     assert 1 == 2 / :__
   end
 
-  koan "Something is not equal to nothing" do
-    assert !(:__ == nil)
+  koan "Unless they actually are different" do
+    assert 3.2 != :__
   end
 
-  koan "When things cannot be equal, they must be different" do
-    refute :__ == 4
+  koan "Some may be looking for bigger things" do
+    assert :__ > 3
+  end
+
+  koan "Others are happy with less" do
+    assert :__ < 3
   end
 end

lib/koans/02_arithmetic.ex

@@ -1,51 +0,0 @@
-defmodule Arithmetic do
-  use Koans
-
-  koan "It can add numbers" do
-    assert 3 + :__ == 7
-  end
-
-  koan "It can substract numbers" do
-    assert 7 - 4 == :__
-  end
-
-  koan "It can multiply" do
-    assert 3 * 4 == :__
-  end
-
-  koan "Floats and integers can be equal..." do
-    assert 3.0 == :__
-  end
-
-  koan "...unless they are not precisely the same" do
-    assert 3.2 != :__
-  end
-
-  koan "It does floating point division" do
-    assert 5 / 2 == :__
-  end
-
-  koan "It does integer division" do
-    numerator = 5
-    denominator = 2
-    assert div(numerator, denominator) == :__
-  end
-
-  koan "It calculates the remainder of a division" do
-    numerator = 5
-    denominator = 2
-    assert rem(numerator, denominator) == :__
-  end
-
-  koan "It finds the maximum in a list" do
-    assert Enum.max([1,2,3,4]) == :__
-  end
-
-  koan "It finds the minimum in a list" do
-    assert Enum.min([1,2,3,4]) == :__
-  end
-
-  koan "It can compare numbers" do
-    assert 5 > :__
-  end
-end