diff --git a/014_scope_and_logic/014_csharp.md b/014_scope_and_logic/014_csharp.md
index dbe160b..9fca94c 100644
--- a/014_scope_and_logic/014_csharp.md
+++ b/014_scope_and_logic/014_csharp.md
@@ -313,4 +313,82 @@ them (for all potential code execution paths).
 
 ---
 
-## 
+## Exercise
+
+### Complete a challenge activity using variable scope
+
+Code challenges will reinforce what you've learned and help you gain some
+confidence before continuing on.
+
+### Variable scope challenge
+
+In this challenge, you'll use what you've learned about code blocks and
+variable scope to fix the poorly written code sample provided. There are many
+improvements that you can make. Good luck!
+
+### Code challenge: update problematic code in the code editor
+
+Ensure that you have an empty Program.cs file open.
+
+Type the following code into the editor:
+
+```cs
+int[] numbers = { 4, 8, 15, 16, 23, 42 };
+
+foreach (int number in numbers) {
+    int total;
+
+    total += number;
+
+    if (number == 42) {
+       bool found = true;
+
+    }
+}
+
+if (found) {
+    Console.WriteLine("Set contains 42");
+}
+
+Console.WriteLine($"Total: {total}");
+```
+
+Review the intended output.
+
+When you have completed the required code edits, your application should
+produce the following output:
+
+```txt
+Set contains 42
+Total: 108
+```
+
+Complete the code updates required so that the existing `Console.WriteLine()`
+statements produce the desired output.
+
+Variable scope may need to be adjusted.
+
+Optimize your code for readability.
+
+Depending on the amount of whitespace that you include and some other factors,
+you should have around 17 lines of code.
+
+```cs
+int[] numbers = { 4, 8, 15, 16, 23, 42 };
+int total = 0;
+bool found = false;
+
+foreach (int number in numbers) {
+    total += number;
+    if (number == 42) {
+       found = true;
+    }
+}
+
+if (found) {
+    Console.WriteLine("Set contains 42");
+}
+
+Console.WriteLine($"Total: {total}");
+```
+---
diff --git a/014_scope_and_logic/scope_and_logic/Program.cs b/014_scope_and_logic/scope_and_logic/Program.cs
index d31a401..b45c5c7 100644
--- a/014_scope_and_logic/scope_and_logic/Program.cs
+++ b/014_scope_and_logic/scope_and_logic/Program.cs
@@ -43,3 +43,46 @@ if (my_var1 > 0) {
     my_var1 += my_var2;
 }
 Console.WriteLine(my_var1);
+Console.WriteLine("----------");
+int[] numbers = { 4, 8, 15, 16, 23, 42 };
+int total=0;
+bool found=false;
+
+foreach (int number in numbers) {
+    total += number;
+    if (number == 42) {
+       found = true;
+    }
+}
+
+if (found) {
+    Console.WriteLine("Set contains 42");
+}
+
+Console.WriteLine($"Total: {total}");
+
+Console.WriteLine("----------");
+int pepe = 1;
+
+if (pepe > 0)
+    Console.WriteLine($"IF: {pepe}");
+else if (pepe < 0)
+    Console.WriteLine($"ELSE IF: {pepe}");
+else
+    Console.WriteLine($"Else: {pepe}");
+
+int mivar = 1;
+if (mivar>0){
+    int mivar2 = 8;
+    mivar += mivar2;
+}
+Console.WriteLine(mivar);
+
+//int var1 = 5;
+//if (var1 > 0){
+//    int var2 = 6;
+//}
+//var1 += var2;
+//Console.WriteLine(var1);
+
+Console.WriteLine("----------");