diff --git a/FLOW_Q3_Krish.java b/FLOW_Q3_Krish.java
new file mode 100644
index 000000000..cc3bbe5c9
--- /dev/null
+++ b/FLOW_Q3_Krish.java
@@ -0,0 +1,18 @@
+// Take a number as input and print the multiplication table for it.
+class FLOW_Q3_Krish
+{
+    public static void main(String[] args)
+    {
+        java.util.Scanner sc = new java.util.Scanner(System.in);
+        System.out.print("Enter a number to print its multiplication table: ");
+        int num = sc.nextInt();
+        
+        System.out.println("Multiplication table for " + num + ":");
+        for (int i = 1; i <= 10; i++) {
+            System.out.println(num + " x " + i + " = " + (num * i));
+        }
+        //
+        // Close the scanner to prevent resource leaks
+        sc.close();
+    }
+}
diff --git a/FLOW_Q4_Krish.java b/FLOW_Q4_Krish.java
new file mode 100644
index 000000000..42806b121
--- /dev/null
+++ b/FLOW_Q4_Krish.java
@@ -0,0 +1,30 @@
+// Take 2 numbers as inputs and find their HCF and LCM.
+public class FLOW_Q4_Krish
+{
+    public static void main(String[] args)
+    {
+        java.util.Scanner sc = new java.util.Scanner(System.in);
+        System.out.print("Enter first number: ");
+        int num1 = sc.nextInt();
+        System.out.print("Enter second number: ");
+        int num2 = sc.nextInt();
+        
+        int hcf = findHCF(num1, num2);
+        int lcm = (num1 * num2) / hcf;
+        
+        System.out.println("HCF of " + num1 + " and " + num2 + " is: " + hcf);
+        System.out.println("LCM of " + num1 + " and " + num2 + " is: " + lcm);
+        
+        // Close the scanner to prevent resource leaks
+        sc.close();
+    }
+    
+    private static int findHCF(int a, int b) {
+        while (b != 0) {
+            int temp = b;
+            b = a % b;
+            a = temp;
+        }
+        return a;
+    }   
+}
diff --git a/FLow_Q2_Krish .java b/FLow_Q2_Krish .java
new file mode 100644
index 000000000..976b0800a
--- /dev/null
+++ b/FLow_Q2_Krish .java	
@@ -0,0 +1,18 @@
+// Take two numbers and print the sum of both.
+import java.util.Scanner;
+class FLow_Q2_Krish 
+{
+    public static void main(String[] args) 
+    {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter first number: ");
+        int num1 = sc.nextInt();
+        System.out.print("Enter second number: ");
+        int num2 = sc.nextInt();
+        
+        int sum = num1 + num2;
+        System.out.println("The sum of " + num1 + " and " + num2 + " is: " + sum);
+        // Close the scanner to prevent resource leaks
+        sc.close();
+    }
+}
diff --git a/lectures/20-trees/code/AVL/.project b/lectures/20-trees/code/AVL/.project
index a2380fe36..b545323bf 100644
--- a/lectures/20-trees/code/AVL/.project
+++ b/lectures/20-trees/code/AVL/.project
@@ -22,12 +22,12 @@
 	</natures>
 	<filteredResources>
 		<filter>
-			<id>1679078569810</id>
+			<id>1752678436405</id>
 			<name></name>
 			<type>30</type>
 			<matcher>
 				<id>org.eclipse.core.resources.regexFilterMatcher</id>
-				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
 			</matcher>
 		</filter>
 	</filteredResources>
diff --git a/lectures/20-trees/code/Questions/.project b/lectures/20-trees/code/Questions/.project
index a2380fe36..a73354206 100644
--- a/lectures/20-trees/code/Questions/.project
+++ b/lectures/20-trees/code/Questions/.project
@@ -22,12 +22,12 @@
 	</natures>
 	<filteredResources>
 		<filter>
-			<id>1679078569810</id>
+			<id>1752678436432</id>
 			<name></name>
 			<type>30</type>
 			<matcher>
 				<id>org.eclipse.core.resources.regexFilterMatcher</id>
-				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
 			</matcher>
 		</filter>
 	</filteredResources>