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..1ef137b 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 +3,55 @@
 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+
+        StringBuilder even = new StringBuilder();
+
+        for (int i = start; i < stop; i++){
+           if((i % 2) == 0){
+                even.append(i);
+           }
+       }
+        return even.toString();
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        StringBuilder odd = new StringBuilder();
+        for (int i = start; i < stop; i++) {
+            if ((i % 2) != 0) {
+                odd.append(i);
+            }
+        }
+        return odd.toString();
     }
 
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        StringBuilder square = new StringBuilder();
+        for(int i = start; i < stop; i+= step){
+            int squaredNum = (int)Math.pow(i, 2);
+                square.append(squaredNum);
+            }
+        return square.toString();
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        StringBuilder range = new StringBuilder();
+        for(int i = start; i < stop; i+= step){
+            range.append(i);
+        }
+        return range.toString();
     }
 
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder expo = new StringBuilder();
+        for(int i = start; i < stop; i += step){
+            int expoVar = exponent;
+            int squaredNum = (int)Math.pow(i, expoVar);
+            expo.append(squaredNum);
+        }
+        return expo.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..046efc8 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 +2,35 @@
 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= 5; i++) {
+            for (int j =1; j <= 5; j++){
+                sb.append(String.format("%3d |", i *j));
+            }
+            sb.append("\n");
+        }
+        return sb.toString();
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= 10; i++) {
+            for (int j =1; j <= 10; j++){
+                sb.append(String.format("%3d |", i *j));
+            }
+            sb.append("\n");
+        }
+        return sb.toString();
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= tableSize; i++) {
+            for (int j =1; j <= tableSize; j++){
+                sb.append(String.format("%3d |", i *j));
+            }
+            sb.append("\n");
+        }
+        return sb.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..8444259 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 +3,46 @@
 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 <= 9; 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;