diff --git a/.project b/.project
index 3cd55b5c..edf7bba4 100644
--- a/.project
+++ b/.project
@@ -14,4 +14,15 @@
 	<natures>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 	</natures>
+	<filteredResources>
+		<filter>
+			<id>1730486517114</id>
+			<name></name>
+			<type>30</type>
+			<matcher>
+				<id>org.eclipse.core.resources.regexFilterMatcher</id>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+			</matcher>
+		</filter>
+	</filteredResources>
 </projectDescription>
diff --git a/src/com/jwetherell/algorithms/mathematics/Division.java b/src/com/jwetherell/algorithms/mathematics/Division.java
index c133f741..03e155c3 100644
--- a/src/com/jwetherell/algorithms/mathematics/Division.java
+++ b/src/com/jwetherell/algorithms/mathematics/Division.java
@@ -3,7 +3,12 @@
 public class Division {
 
     public static final long division(int a, int b) {
+		if (b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+		
         long result = ((long) a) / ((long) b);
+		
         return result;
     }
 
@@ -11,13 +16,18 @@ public static final long divisionUsingLoop(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+		if (b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+		
         long temp = absA;
         long result = 0;
         while (temp >= 0) {
             temp -= absB;
             if (temp >= 0)
                 result++;
-        }
+       	 }
+		
         return (a > 0 && b > 0 || a < 0 && b < 0) ? result : -result;
     }
 
@@ -25,13 +35,17 @@ public static final long divisionUsingRecursion(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+		if (b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+
         long result = 1;
         int diff = absA - absB;
         if (diff > 0 && diff <= 1) {
             return result;
-        } else if (diff < 0) {
+       	 } else if (diff < 0) {
             return 0;
-        }
+      	  }
 
         result += divisionUsingRecursion(diff, absB);
         return (a > 0 && b > 0 || a < 0 && b < 0) ? result : -result;
@@ -41,6 +55,10 @@ public static final long divisionUsingMultiplication(int a, int b) {
         int absA = Math.abs(a);
         int absB = Math.abs(b);
 
+		if(b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+
         int temp = absB;
         int counter = 0;
         while (temp <= absA) {
@@ -59,6 +77,10 @@ public static final long divisionUsingShift(int a, int b) {
         int absB = Math.abs(b);
         int tempA, tempB, counter;
 
+		if(b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+
         long result = 0L;
         while (absA >= absB) {
             tempA = absA >> 1; // Right shift "a"
@@ -78,6 +100,11 @@ public static final long divisionUsingShift(int a, int b) {
     public static final long divisionUsingLogs(int a, int b) {
         long absA = Math.abs(a);
         long absB = Math.abs(b);
+
+		if(b == 0){
+			throw now IllegalArgumentException ("Denominator is 0.");
+		}
+
         double logBase10A = Math.log10(absA);
         double logBase10B = Math.log10(absB);
         double powOf10 = Math.pow(10, (logBase10A - logBase10B));