diff --git a/src/main/scala/DifferenceOfSquares.scala b/src/main/scala/DifferenceOfSquares.scala
index 201e941..6e87a2b 100644
--- a/src/main/scala/DifferenceOfSquares.scala
+++ b/src/main/scala/DifferenceOfSquares.scala
@@ -1,8 +1,21 @@
 object DifferenceOfSquares{
 
-  def sumOfSquares(n: Int): Int = ???
+def sumOfSquares(n: Int): Int ={
+  var answer = 0
+  for (number <- (1 to n)){
+    answer = answer + (number * number)
+  }
+  answer
+}
 
-  def squareOfSum(n: Int): Int = ???
+def squareOfSum(n: Int): Int ={
+  var answer = 0
+  for (number <- (1 to n)) {
+    answer = answer + number
+  }
+  answer * answer
+}
 
-  def differenceOfSquares(n: Int):Int = ???
+def differenceOfSquares(n: Int):Int ={
+  squareOfSum(n) - sumOfSquares(n)
 }