diff --git a/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java b/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java
index 5a742c4..30a764f 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java
@@ -3,26 +3,84 @@
 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+
+        StringBuilder evenNumbers = new StringBuilder();
+
+        for(int i = start; i < stop; i++){
+
+            if (i % 2 == 0){
+                evenNumbers.append(i);
+            }
+        }
+
+
+        return evenNumbers.toString();
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+
+        StringBuilder oddNumbers = new StringBuilder();
+
+        for(int i = start; i < stop; i++){
+
+            if (i % 2 != 0){
+                oddNumbers.append(i);
+            }
+        }
+
+
+        return oddNumbers.toString();
+
     }
 
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+
+        StringBuilder squareNumbers = new StringBuilder();
+
+        for(int i = start; i < stop; i += step){
+
+
+
+                squareNumbers.append((int)(Math.pow(i,2)));
+            }
+
+
+        return squareNumbers.toString();
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+
+        StringBuilder rangeNumbers = new StringBuilder();
+
+        for(int i = start; i < stop; i += step){
+
+
+
+            rangeNumbers.append(i);
+        }
+
+
+        return rangeNumbers.toString();
+
     }
 
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder exponentNumbers = new StringBuilder();
+
+        for(int i = start; i < stop; i += step){
+
+
+
+            exponentNumbers.append((int)(Math.pow(i,exponent)));
+        }
+
+
+        return exponentNumbers.toString();
     }
+
 }
+
diff --git a/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java b/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java
index e27a826..8899ecd 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java
@@ -2,14 +2,62 @@
 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+
+
+        StringBuilder output = new StringBuilder();
+
+
+        for (int i = 1; i <=5; ++i)
+        {
+
+            for (int j =1; j<=5; ++j)
+            {
+
+                int product = i*j;
+                output.append(String.format("%3d |", product));
+            }
+            System.out.println();
+            output.append("\n");
+        }
+        return output.toString();
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        StringBuilder output = new StringBuilder();
+
+
+        for (int i = 1; i <=10; ++i)
+        {
+
+            for (int j =1; j<=10; ++j)
+            {
+
+                int product = i*j;
+                output.append(String.format("%3d |", product));
+            }
+            System.out.println();
+            output.append("\n");
+        }
+        return output.toString();
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder output = new StringBuilder();
+
+
+        for (int i = 1; i <=tableSize; ++i)
+        {
+
+            for (int j =1; j<=tableSize; ++j)
+            {
+
+                int product = i*j;
+                output.append(String.format("%3d |", product));
+            }
+            System.out.println();
+            output.append("\n");
+        }
+        return output.toString();
     }
-}
+    }
+
diff --git a/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java b/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java
index 0c7cd35..523e3dc 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java
@@ -3,18 +3,70 @@
 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        String output ="";
+        for(int i = 1; i < numberOfRows; i++){
+            for(int j = 0; j < i;j++){
+                output += "*";
+
+            }
+
+            output += "\n";
+
+        }
+
+        return output;
+
+
+
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        String output ="";
+        for(int i = 0; i < numberOfStars; i++){
+            output += "*";
+
+
+
+    }
+
+        return output;
+
+
     }
 
     public static String getSmallTriangle() {
-        return null;
+        String output ="";
+        for(int i = 1; i <= 4; i++){
+            for(int j = 0; j < i;j++){
+                output += "*";
+
+            }
+
+            output += "\n";
+
+        }
+
+        return output;
+
     }
 
     public static String getLargeTriangle() {
-        return null;
+        String output ="";
+        for(int i = 1; i < 10; i++){
+            for(int j = 0; j < i;j++){
+                output += "*";
+
+            }
+
+            output += "\n";
+
+        }
+
+        return output;
+
+
     }
 }
+
+
+
diff --git a/src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java b/src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java
index e579b43..5ce91f7 100644
--- a/src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java
+++ b/src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java
@@ -51,7 +51,7 @@ public void testGetRange2() {
     @Test
     public void testGetEvenNumbers() {
         // : Given
-        String expected = "5791113151719";
+        String expected = "681012141618";
         int start = 5;
         int stop = 20;
 
@@ -65,7 +65,7 @@ public void testGetEvenNumbers() {
     @Test
     public void testGetOddNumbers() {
         // : Given
-        String expected = "681012141618";
+        String expected = "5791113151719";
         int start = 5;
         int stop = 20;
         int step = 5;