diff --git a/R DEVISH- EASY LEVEL/NumberGuessingGame.java b/R DEVISH- EASY LEVEL/NumberGuessingGame.java
new file mode 100644
index 0000000..cba59e6
--- /dev/null
+++ b/R DEVISH- EASY LEVEL/NumberGuessingGame.java	
@@ -0,0 +1,27 @@
+import java.util.Random;
+import java.util.Scanner;
+
+public class NumberGuessingGame {
+    public static void main(String args[]) {
+        Random random = new Random();
+        Scanner scanner = new Scanner(System.in);
+        int chances = 5;
+        int randomNumber = random.nextInt(100);
+        
+        System.out.println("Welcome to the Number Guessing Game!");
+        System.out.println("You have " + chances + " chances to guess the number.");
+
+        for (int i = 0; i < chances; i++) {
+            System.out.println("Enter your guess (between 0 and 99):");
+            int guess = scanner.nextInt();
+
+            if (guess == randomNumber) {
+                System.out.println("Congratulations! You guessed it right!");
+                break;
+            } else {
+                System.out.println("Incorrect guess. You have " + (chances - i - 1) + " chances left.");
+            }
+        }       
+        scanner.close();
+    }
+}
\ No newline at end of file
diff --git a/R DEVISH- EASY LEVEL/SimpleCalculator.java b/R DEVISH- EASY LEVEL/SimpleCalculator.java
new file mode 100644
index 0000000..6bafc69
--- /dev/null
+++ b/R DEVISH- EASY LEVEL/SimpleCalculator.java	
@@ -0,0 +1,43 @@
+import java.util.Scanner;
+public class SimpleCalculator {
+        public static void main(String args[]) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Simple Calculator");
+        System.out.println("Enter the first number:");
+        double num1 = scanner.nextDouble();
+        System.out.println("Enter the second number:");
+        double num2 = scanner.nextDouble();
+        System.out.println("Select operation:");
+        System.out.println("1. Addition (+)");
+        System.out.println("2. Subtraction (-)");
+        System.out.println("3. Multiplication (*)");
+        System.out.println("4. Division (/)");
+        int choice = scanner.nextInt();
+        double result;
+        switch (choice) {
+            case 1:
+                result = num1 + num2;
+                System.out.println("Result: " + result);
+                break;
+            case 2:
+                result = num1 - num2;
+                System.out.println("Result: " + result);
+                break;
+            case 3:
+                result = num1 * num2;
+                System.out.println("Result: " + result);
+                break;
+            case 4:
+                if (num2 == 0) {
+                    System.out.println("Error: Division by zero");
+                } else {
+                    result = num1 / num2;
+                    System.out.println("Result: " + result);
+                }
+                break;
+            default:
+                System.out.println("Invalid choice");
+        }
+        scanner.close();
+    }
+}
\ No newline at end of file
diff --git a/R DEVISH- EASY LEVEL/TaskManager.java b/R DEVISH- EASY LEVEL/TaskManager.java
new file mode 100644
index 0000000..80badfb
--- /dev/null
+++ b/R DEVISH- EASY LEVEL/TaskManager.java	
@@ -0,0 +1,91 @@
+
+
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class TaskManager {
+    private static ArrayList<String> tasks = new ArrayList<>();
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        boolean exit = false;
+
+        while (!exit) {
+            System.out.println("Task Manager");
+            System.out.println("1. Add Task");
+            System.out.println("2. Delete Task");
+            System.out.println("3. Mark Task as Completed");
+            System.out.println("4. View Tasks");
+            System.out.println("5. Exit");
+            System.out.print("Enter your choice: ");
+            int choice = scanner.nextInt();
+            scanner.nextLine(); // Consume newline character
+
+            switch (choice) {
+                case 1:
+                    System.out.print("Enter task to add: ");
+                    String taskToAdd = scanner.nextLine();
+                    addTask(taskToAdd);
+                    break;
+                case 2:
+                    System.out.print("Enter index of task to delete: ");
+                    int indexToDelete = scanner.nextInt();
+                    scanner.nextLine(); // Consume newline character
+                    deleteTask(indexToDelete);
+                    break;
+                case 3:
+                    System.out.print("Enter index of task to mark as completed: ");
+                    int indexToComplete = scanner.nextInt();
+                    scanner.nextLine(); // Consume newline character
+                    markTaskAsCompleted(indexToComplete);
+                    break;
+                case 4:
+                    viewTasks();
+                    break;
+                case 5:
+                    exit = true;
+                    System.out.println("Exiting...");
+                    break;
+                default:
+                    System.out.println("Invalid choice. Please enter a number between 1 and 5.");
+            }
+        }
+
+        scanner.close();
+    }
+
+    private static void addTask(String task) {
+        tasks.add(task);
+        System.out.println("Task added successfully.");
+    }
+
+    private static void deleteTask(int index) {
+        if (index >= 0 && index < tasks.size()) {
+            tasks.remove(index);
+            System.out.println("Task deleted successfully.");
+        } else {
+            System.out.println("Invalid index. No task deleted.");
+        }
+    }
+
+    private static void markTaskAsCompleted(int index) {
+        if (index >= 0 && index < tasks.size()) {
+            String task = tasks.get(index);
+            tasks.set(index, "[Completed] " + task);
+            System.out.println("Task marked as completed.");
+        } else {
+            System.out.println("Invalid index. No task marked as completed.");
+        }
+    }
+
+    private static void viewTasks() {
+        if (tasks.isEmpty()) {
+            System.out.println("No tasks found.");
+        } else {
+            System.out.println("Tasks:");
+            for (int i = 0; i < tasks.size(); i++) {
+                System.out.println(i + ". " + tasks.get(i));
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/R DEVISH- EASY LEVEL/TemperatureConverter.java b/R DEVISH- EASY LEVEL/TemperatureConverter.java
new file mode 100644
index 0000000..7abc11f
--- /dev/null
+++ b/R DEVISH- EASY LEVEL/TemperatureConverter.java	
@@ -0,0 +1,86 @@
+import java.util.Scanner;
+public class TemperatureConverter {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Temperature Converter");
+        System.out.println("Choose the original temperature scale:");
+        System.out.println("1. Celsius");
+        System.out.println("2. Fahrenheit");
+        System.out.println("3. Kelvin");
+        int originalScale = scanner.nextInt();
+
+        System.out.println("Enter the temperature:");
+        double temperature = scanner.nextDouble();
+
+        System.out.println("Choose the target temperature scale:");
+        System.out.println("1.Celsius");
+        System.out.println("2.Fahrenheit");
+        System.out.println("3.Kelvin");
+        int targetScale = scanner.nextInt();
+
+        double convertedTemperature = convertTemperature(temperature, originalScale, targetScale);
+
+        System.out.println("Converted temperature:" + convertedTemperature);
+
+        scanner.close();
+    }
+
+    public static double convertTemperature(double temperature, int originalScale, int targetScale) {
+        switch (originalScale) {
+            case 1:
+                switch (targetScale) {
+                    case 1:
+                        return temperature;
+                    case 2:
+                        return celsiusToFahrenheit(temperature);
+                    case 3: // Celsius to Kelvin
+                        return celsiusToKelvin(temperature);
+                }
+            case 2: 
+                switch (targetScale) {
+                    case 1:
+                        return fahrenheitToCelsius(temperature);
+                    case 2:
+                        return temperature;
+                    case 3: 
+                        return fahrenheitToKelvin(temperature);
+                }
+            case 3: // Kelvin
+                switch (targetScale) {
+                    case 1: 
+                        return kelvinToCelsius(temperature);
+                    case 2:
+                        return kelvinToFahrenheit(temperature);
+                    case 3:
+                        return temperature;
+                }
+            default:
+                return 0.0;
+        }
+    }
+
+    public static double celsiusToFahrenheit(double celsius) {
+        return (celsius * 9 / 5) + 32;
+    }
+
+    public static double celsiusToKelvin(double celsius) {
+        return celsius + 273.15;
+    }
+
+    public static double fahrenheitToCelsius(double fahrenheit) {
+        return (fahrenheit - 32) * 5 / 9;
+    }
+
+    public static double fahrenheitToKelvin(double fahrenheit) {
+        return (fahrenheit + 459.67) * 5 / 9;
+    }
+
+    public static double kelvinToCelsius(double kelvin) {
+        return kelvin - 273.15;
+    }
+
+    public static double kelvinToFahrenheit(double kelvin) {
+        return (kelvin * 9 / 5) - 459.67;
+    }
+}
\ No newline at end of file