diff --git a/ModularAddMulSub.html b/ModularAddMulSub.html
index 1909879..7c3466c 100644
--- a/ModularAddMulSub.html
+++ b/ModularAddMulSub.html
@@ -38,7 +38,7 @@ <h1 style="color: whitesmoke">Number theory</h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/Primality.html b/Primality.html
index 80fdc2e..724f244 100644
--- a/Primality.html
+++ b/Primality.html
@@ -37,7 +37,7 @@ <h1 style="color: white"><b>Number theory</b></h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/PrimeFact.html b/PrimeFact.html
index 5aaf1f2..3956dca 100644
--- a/PrimeFact.html
+++ b/PrimeFact.html
@@ -35,7 +35,7 @@ <h1 style="color: white"><b>Number theory</b></h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/RSA.html b/RSA.html
index c41ecf2..aec59c3 100644
--- a/RSA.html
+++ b/RSA.html
@@ -37,7 +37,7 @@ <h1 style="color: white"><b>Number theory</b></h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/bubble.html b/bubble.html
index 3b13077..bc3acc8 100644
--- a/bubble.html
+++ b/bubble.html
@@ -37,7 +37,7 @@ <h1 style="color: white"><b>Algorithms</b></h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/congo.html b/congo.html
index ea3efa4..bfa7f0f 100644
--- a/congo.html
+++ b/congo.html
@@ -37,7 +37,7 @@ <h1 style="color: white"><b>Number theory</b></h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/index.html b/index.html
index 8080950..892f1e9 100644
--- a/index.html
+++ b/index.html
@@ -37,7 +37,7 @@ <h1 class="header h1" style="color: whitesmoke">Mathematica</h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->
diff --git a/welcome.html b/welcome.html
index da3483c..b1f2cbd 100644
--- a/welcome.html
+++ b/welcome.html
@@ -37,7 +37,7 @@ <h1 class="header h1" style="color: whitesmoke">Number theory</h1>
       <a id="feed">Feedback</a>
 
 </div><a style="font-size:20px;cursor:pointer ;color:white ; padding-bottom: 8px" onclick="openNav()">&#9776;</a>
-  <a href="front.html" >Home</a>
+  <a href="index.html" >Home</a>
   <div class="dropdown">
     <button class="dropbtn">Primes
     <!--<i class="fa fa-caret-down"></i>-->