diff --git a/activerecord/lib/active_record/attribute_methods/query.rb b/activerecord/lib/active_record/attribute_methods/query.rb
index 83b858aae7fad..553122a5fc8a0 100644
--- a/activerecord/lib/active_record/attribute_methods/query.rb
+++ b/activerecord/lib/active_record/attribute_methods/query.rb
@@ -15,7 +15,6 @@ def query_attribute(attr_name)
         when false, nil  then false
         else
           column = self.class.columns_hash[attr_name]
-          type = self.class.type_for_attribute(attr_name)
           if column.nil?
             if Numeric === value || value !~ /[^0-9]/
               !value.to_i.zero?
@@ -23,7 +22,7 @@ def query_attribute(attr_name)
               return false if ActiveRecord::ConnectionAdapters::Column::FALSE_VALUES.include?(value)
               !value.blank?
             end
-          elsif type.number?
+          elsif value.respond_to?(:zero?)
             !value.zero?
           else
             !value.blank?
diff --git a/activerecord/lib/active_record/type/helpers/numeric.rb b/activerecord/lib/active_record/type/helpers/numeric.rb
index 86888eef75340..b0d4f031170c3 100644
--- a/activerecord/lib/active_record/type/helpers/numeric.rb
+++ b/activerecord/lib/active_record/type/helpers/numeric.rb
@@ -2,10 +2,6 @@ module ActiveRecord
   module Type
     module Helpers
       module Numeric # :nodoc:
-        def number?
-          true
-        end
-
         def type_cast(value)
           value = case value
                   when true then 1
diff --git a/activerecord/lib/active_record/type/value.rb b/activerecord/lib/active_record/type/value.rb
index 7f384bee682ef..7338920f3b839 100644
--- a/activerecord/lib/active_record/type/value.rb
+++ b/activerecord/lib/active_record/type/value.rb
@@ -52,10 +52,6 @@ def type_cast_for_schema(value) # :nodoc:
 
       # These predicates are not documented, as I need to look further into
       # their use, and see if they can be removed entirely.
-      def number? # :nodoc:
-        false
-      end
-
       def binary? # :nodoc:
         false
       end
diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index 35b792b1c24e5..19ebef4981a83 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -36,14 +36,12 @@ def test_column
     assert_equal :string, @column.type
     assert_equal "character varying", @column.sql_type
     assert @column.array?
-    assert_not @type.number?
     assert_not @type.binary?
 
     ratings_column = PgArray.columns_hash['ratings']
     assert_equal :integer, ratings_column.type
     type = PgArray.type_for_attribute("ratings")
     assert ratings_column.array?
-    assert_not type.number?
   end
 
   def test_default
diff --git a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
index 52fa46bd01a75..6c6b4dc22a879 100644
--- a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
@@ -30,7 +30,6 @@ def test_bit_string_column
     assert_not column.array?
 
     type = PostgresqlBitString.type_for_attribute("a_bit")
-    assert_not type.number?
     assert_not type.binary?
   end
 
@@ -41,7 +40,6 @@ def test_bit_string_varying_column
     assert_not column.array?
 
     type = PostgresqlBitString.type_for_attribute("a_bit_varying")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/citext_test.rb b/activerecord/test/cases/adapters/postgresql/citext_test.rb
index 077f0271e2c2b..0ee2a2148403b 100644
--- a/activerecord/test/cases/adapters/postgresql/citext_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/citext_test.rb
@@ -34,7 +34,6 @@ def test_column
       assert_not column.array?
 
       type = Citext.type_for_attribute('cival')
-      assert_not type.number?
       assert_not type.binary?
     end
 
diff --git a/activerecord/test/cases/adapters/postgresql/composite_test.rb b/activerecord/test/cases/adapters/postgresql/composite_test.rb
index 0c0d2465b20df..83dfb18e95567 100644
--- a/activerecord/test/cases/adapters/postgresql/composite_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/composite_test.rb
@@ -52,7 +52,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlComposite.type_for_attribute("address")
-    assert_not type.number?
     assert_not type.binary?
   end
 
@@ -115,7 +114,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlComposite.type_for_attribute("address")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/domain_test.rb b/activerecord/test/cases/adapters/postgresql/domain_test.rb
index 702de07597181..b7d776b40c808 100644
--- a/activerecord/test/cases/adapters/postgresql/domain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/domain_test.rb
@@ -31,7 +31,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlDomain.type_for_attribute("price")
-    assert type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/enum_test.rb b/activerecord/test/cases/adapters/postgresql/enum_test.rb
index 7739d2ee3b5b9..acb09b06070f2 100644
--- a/activerecord/test/cases/adapters/postgresql/enum_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/enum_test.rb
@@ -33,7 +33,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlEnum.type_for_attribute("current_mood")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/full_text_test.rb b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
index 8357dcb3dc2f8..81891a90fa7b4 100644
--- a/activerecord/test/cases/adapters/postgresql/full_text_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
@@ -23,7 +23,6 @@ def test_tsvector_column
     assert_not column.array?
 
     type = Tsvector.type_for_attribute("text_vector")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/geometric_test.rb b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
index 5d2e86c5a0b59..4b25381a830fd 100644
--- a/activerecord/test/cases/adapters/postgresql/geometric_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
@@ -28,7 +28,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlPoint.type_for_attribute("x")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/hstore_test.rb b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
index 121f347986fa4..11053a6e38d23 100644
--- a/activerecord/test/cases/adapters/postgresql/hstore_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
@@ -56,7 +56,6 @@ def test_column
       assert_equal "hstore", @column.sql_type
       assert_not @column.array?
 
-      assert_not @type.number?
       assert_not @type.binary?
     end
 
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
index dd7b67bad726b..cbe7e62870423 100644
--- a/activerecord/test/cases/adapters/postgresql/json_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -36,7 +36,6 @@ def test_column
     assert_not column.array?
 
     type = JsonDataType.type_for_attribute("payload")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/ltree_test.rb b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
index ca17edfd034f2..2b3823f9f1872 100644
--- a/activerecord/test/cases/adapters/postgresql/ltree_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
@@ -32,7 +32,6 @@ def test_column
     assert_not column.array?
 
     type = Ltree.type_for_attribute('path')
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/money_test.rb b/activerecord/test/cases/adapters/postgresql/money_test.rb
index f5621fd3ec634..ba9af4be6fa28 100644
--- a/activerecord/test/cases/adapters/postgresql/money_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/money_test.rb
@@ -27,7 +27,6 @@ def test_column
     assert_not column.array?
 
     type = PostgresqlMoney.type_for_attribute("wealth")
-    assert type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/network_test.rb b/activerecord/test/cases/adapters/postgresql/network_test.rb
index efe754ac7c1ec..4cd2d4d5f37a6 100644
--- a/activerecord/test/cases/adapters/postgresql/network_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/network_test.rb
@@ -25,7 +25,6 @@ def test_cidr_column
     assert_not column.array?
 
     type = PostgresqlNetworkAddress.type_for_attribute("cidr_address")
-    assert_not type.number?
     assert_not type.binary?
   end
 
@@ -36,7 +35,6 @@ def test_inet_column
     assert_not column.array?
 
     type = PostgresqlNetworkAddress.type_for_attribute("inet_address")
-    assert_not type.number?
     assert_not type.binary?
   end
 
@@ -47,7 +45,6 @@ def test_macaddr_column
     assert_not column.array?
 
     type = PostgresqlNetworkAddress.type_for_attribute("mac_address")
-    assert_not type.number?
     assert_not type.binary?
   end
 
diff --git a/activerecord/test/cases/adapters/postgresql/uuid_test.rb b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
index 1d0f013a265e1..6693843497227 100644
--- a/activerecord/test/cases/adapters/postgresql/uuid_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
@@ -51,7 +51,6 @@ def test_data_type_of_uuid_types
     assert_not column.array?
 
     type = UUIDType.type_for_attribute("guid")
-    assert_not type.number?
     assert_not type.binary?
   end