diff --git a/.ruby-version b/.ruby-version
index 7208c21..197c4d5 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.4
\ No newline at end of file
+2.4.0
diff --git a/models/sarahb_fizzbuzz.rb b/models/sarahb_fizzbuzz.rb
new file mode 100644
index 0000000..9165a3f
--- /dev/null
+++ b/models/sarahb_fizzbuzz.rb
@@ -0,0 +1,27 @@
+
+class Fizzbuzz
+
+   def initialize number
+      @fizzbuzz = number
+   end
+
+   def string
+     x = @fizzbuzz
+    case
+      when x % 3 == 0 && x % 5 == 0
+          "fizzbuzz"
+      when x % 3 == 0
+          "fizz"
+      when x % 5 == 0
+          "buzz"
+      else
+         x
+    end 
+  end
+end
+
+
+(1..100).each do |n|
+  fb = Fizzbuzz.new(n)
+  puts (fb.string)
+end
diff --git a/specs/models/sarahb_fizzbuzz_spec.rb b/specs/models/sarahb_fizzbuzz_spec.rb
new file mode 100644
index 0000000..0b416f5
--- /dev/null
+++ b/specs/models/sarahb_fizzbuzz_spec.rb
@@ -0,0 +1,25 @@
+require 'rspec'
+require_relative "../../models/sarahb_fizzbuzz"
+
+describe 'fizzbuzz' do
+  it " returns 1" do
+      fb = Fizzbuzz.new(1)
+    expect(fb.string).to eq(1)
+  end
+  it "returns fizz for a multiple of 3" do
+      fb = Fizzbuzz.new(3)
+      expect(fb.string).to eq('fizz')
+  end
+  it 'returns buzz for a multiple 5' do
+      fb = Fizzbuzz.new(5)
+      expect(fb.string).to eq('buzz')
+
+  end
+  it 'returns fizzbuzz for multiples of 3 and 5' do
+      fb = Fizzbuzz.new(15)
+      expect(fb.string).to eq('fizzbuzz')
+  end
+
+end
+
+puts Fizzbuzz.new(15).string