diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..93f8eca
Binary files /dev/null and b/.DS_Store differ
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..350ac9a 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java
@@ -2,27 +2,38 @@
 
 
 public class NumberUtilities {
+
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        if(start%2 != 0)  start += 1;
+        return getRange(start,stop,2);
     }
 
-
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        if(start %2 == 0) start += 1;
+        return getRange(start,stop,2);
     }
 
-
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        StringBuilder square = new StringBuilder();
+        for(int i = start; i < stop; i+=step) square.append(i*i);
+        return square.toString();
     }
 
-
     public static String getRange(int start, int stop, int step) {
-        return null;
+        StringBuilder xEach = new StringBuilder();
+        for(int i = start; i < stop; i+=step) xEach.append(i);
+        return xEach.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){
+            expo.append((int)(Math.pow(i, exponent)));
+        }
+        return expo.toString();
+    }
+
+    public static void main(String[] args){
+
     }
 }
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..1d02125 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java
@@ -1,15 +1,23 @@
 package io.zipcoder.microlabs.mastering_loops;
 
 public class TableUtilities {
+
     public static String getSmallMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(5);
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(10);
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder size = new StringBuilder();
+        for(int i = 1; i <= tableSize; i++) {
+            for (int j = 1; j <= tableSize; j++) {
+                size.append(String.format("%3d |", j*i));
+            }
+            size.append("\n");
+        }
+        return size.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..23e1ac8 100644
--- a/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java
+++ b/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java
@@ -2,19 +2,31 @@
 
 public class TriangleUtilities {
 
-    public static String getTriangle(int numberOfRows) {
-        return null;
-    }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        StringBuilder aster = new StringBuilder();
+        int counter = 0;
+        while(counter < numberOfStars) {
+            aster.append("*");
+            counter++;
+        }
+        return aster.toString();
+    }
+
+    public static String getTriangle(int numberOfRows) {
+        StringBuilder builder = new StringBuilder();
+        for(int i = 1; i<=numberOfRows; i++){
+            builder.append(getRow(i))
+                    .append("\n");
+        }
+        return builder.toString();
     }
 
     public static String getSmallTriangle() {
-        return null;
+        return getTriangle(4);
     }
 
     public static String getLargeTriangle() {
-        return null;
+        return getTriangle(9);
     }
 }
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;
diff --git a/src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java b/src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java
index 47846c2..3f7d7cb 100644
--- a/src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java
+++ b/src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java
@@ -18,7 +18,7 @@ public void getRow() {
     @Test
     public void getTriangleTest1() {
         String expected =
-                "*\n" +
+                        "*\n" +
                         "**\n" +
                         "***\n" +
                         "****\n" +
@@ -26,7 +26,8 @@ public void getTriangleTest1() {
                         "******\n" +
                         "*******\n" +
                         "********\n" +
-                        "*********\n";
+                        "*********\n" +
+                        "**********\n";
         String actual = TriangleUtilities.getTriangle(10);
         Assert.assertEquals(expected, actual);
     }
@@ -34,10 +35,11 @@ public void getTriangleTest1() {
     @Test
     public void getTriangleTest2() {
         String expected =
-                "*\n" +
+                        "*\n" +
                         "**\n" +
                         "***\n" +
-                        "****\n";
+                        "****\n" +
+                        "*****\n";
         String actual = TriangleUtilities.getTriangle(5);
         Assert.assertEquals(expected, actual);
     }