diff --git a/lib/14_find_number.rb b/lib/14_find_number.rb
index c23e68b..1af7464 100644
--- a/lib/14_find_number.rb
+++ b/lib/14_find_number.rb
@@ -19,4 +19,15 @@ def make_guess(min = @min, max = @max)
   def game_over?
     return true if @guess == @answer
   end
+
+  def update_range
+    case @guess <=> @answer
+    when -1
+      @min = @guess + 1
+    when 0
+      return
+    when 1
+      @max = @guess - 1
+    end
+  end
 end
diff --git a/spec/14_find_number_spec.rb b/spec/14_find_number_spec.rb
index 8993f8e..5cd83e1 100644
--- a/spec/14_find_number_spec.rb
+++ b/spec/14_find_number_spec.rb
@@ -219,20 +219,36 @@
     context 'when the guess is less than the answer' do
       subject(:low_guess_game) { described_class.new(0, 9, number_range, 4) }
 
-      xit 'updates min to 5' do
+      before do
+        low_guess_game.update_range
       end
 
-      xit 'does not update max' do
+      it 'updates min to 5' do
+        minimum = low_guess_game.min
+        expect(minimum).to eq(5)
+      end
+
+      it 'does not update max' do
+        maximum = low_guess_game.max
+        expect(maximum).to eq(9)
       end
     end
 
     context 'when the guess is more than the answer' do
       subject(:high_guess_game) { described_class.new(0, 9, number_range, 9) }
 
-      xit 'does not update min' do
+      before do
+        high_guess_game.update_range
+      end
+
+      it 'does not update min' do
+        minimum = high_guess_game.min
+        expect(minimum).to eq(0)
       end
 
-      xit 'updates max to 8' do
+      it 'updates max to 8' do
+        maximum = high_guess_game.max
+        expect(maximum).to eq(8)
       end
     end