diff --git a/.classpath b/.classpath
index 51a8bba..af6f9dc 100644
--- a/.classpath
+++ b/.classpath
@@ -1,6 +1,6 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<classpath>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
-	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="output" path="bin"/>
-</classpath>
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index 3a21537..87b7a7a 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -1,5 +1,6 @@
 eclipse.preferences.version=1
 org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
 org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
 org.eclipse.jdt.core.compiler.compliance=1.8
@@ -8,4 +9,5 @@ org.eclipse.jdt.core.compiler.debug.localVariable=generate
 org.eclipse.jdt.core.compiler.debug.sourceFile=generate
 org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.release=disabled
 org.eclipse.jdt.core.compiler.source=1.8
diff --git a/src/practice01/Controller.java b/src/practice01/Controller.java
new file mode 100644
index 0000000..f1992ec
--- /dev/null
+++ b/src/practice01/Controller.java
@@ -0,0 +1,56 @@
+package practice01;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class Controller {
+	
+	
+	public static void main(String[] args) {
+		
+		
+		List<TaskFactory> tasks = new ArrayList<>();
+		for(int i=1; i<6; ++i) {
+			TaskFactory task = null;
+			try {
+				
+			task = (TaskFactory) Class.forName("practice01.Prob"+i).newInstance();
+			
+			}catch (Exception e) {
+				e.printStackTrace();
+			}
+			tasks.add(task);
+			
+		}
+		
+	
+		for(int i=0; i<tasks.size(); ++i) {
+			
+			try {
+				System.out.println("----------- 문제 출제 중입니다... -----------");
+				Thread.sleep(3000);
+
+			}catch(InterruptedException e) {
+				
+				e.printStackTrace();
+			}
+			
+			System.out.println("------------------ "+ (i+1) +"번 문제입니다.. ----------------");
+			TaskFactory task = tasks.get(i);
+			task.input();
+			task.solve();
+			task.print();
+			System.out.println("------------------"+ (i+1) +"번 문제 종료 ----------------");
+
+		}
+		
+	}
+
+}
+
+
+
+
+
+
diff --git a/src/practice01/Prob1.java b/src/practice01/Prob1.java
index c038781..8967194 100644
--- a/src/practice01/Prob1.java
+++ b/src/practice01/Prob1.java
@@ -1,12 +1,33 @@
 package practice01;
 
-import java.util.Scanner;
+public class Prob1 extends TaskFactory{
+	
+	
+	@Override
+	public void input() {
+		
+		System.out.println("숫자를 입력하세요..");
+		input = sc.nextInt();
+		
+	}
 
-public class Prob1 {
-	public static void main(String[] args) {
-		Scanner scanner = new Scanner( System.in );
+	@Override
+	public void solve() {
 		
+		if(input % 3 == 0) {
+			
+			System.out.println("입력받은 숫자는 3의 배수 입니다.");
+			return;
+			
+		}else {
+			
+			System.out.println("입력받은 숫자는 3의 배수가 아닙니다.");
+			return;
+		}
 		
-		scanner.close();
 	}
-}
+	
+	
+	
+	
+}
\ No newline at end of file
diff --git a/src/practice01/Prob2.java b/src/practice01/Prob2.java
index 32d40f0..db94dc7 100644
--- a/src/practice01/Prob2.java
+++ b/src/practice01/Prob2.java
@@ -1,6 +1,26 @@
 package practice01;
 
-public class Prob2 {
-	public static void main(String[] args) {
+//2번 문제
+public class Prob2 extends TaskFactory{
+
+
+	@Override
+	public void solve() {
+		
+		int i = 0;
+		
+		for(i = 0; i<10; ++i) {
+			
+			for(int j=0; j<10; ++j) {
+				
+				System.out.print((i+j) + "\t");
+				
+			}
+			System.out.println("");
+			
+			
+		}
+		
 	}
-}
+	
+}
\ No newline at end of file
diff --git a/src/practice01/Prob3.java b/src/practice01/Prob3.java
index 3b7ab3c..aa80f4e 100644
--- a/src/practice01/Prob3.java
+++ b/src/practice01/Prob3.java
@@ -1,7 +1,57 @@
 package practice01;
 
-public class Prob3 {
+//3번 문제
+class Prob3 extends TaskFactory{
+
+	int sum = 0;
+	int start = 0;
+	boolean numIsOdd = false;
+
+	@Override
+	public void input() {
+		super.input();
+		System.out.println("-----숫자를 입력하세요------");
+		input = sc.nextInt();
+		validate();
+	}
+
+	@Override
+	public void solve() {
+		
+		
+		for(int i = start; i < input+1; i=i+2) {
+			
+			sum += i;
+			System.out.print(i+"\t");
+			
+		}
+		
 	
-	public static void main(String[] args) {
 	}
-}
+	
+	
+	@Override
+	public void print() {
+		
+		super.print();
+		System.out.println("입력한 숫자..." + input);
+		System.out.println("합계... " + sum);
+	
+	}
+
+	private void validate() {
+		
+		if(input % 2 == 0) {
+			
+			numIsOdd = false;
+			start = 2;
+			
+		}else{
+			
+			numIsOdd = true;
+			start = 1;
+		}
+		
+	}
+	
+}
\ No newline at end of file
diff --git a/src/practice01/Prob4.java b/src/practice01/Prob4.java
index 7d38c33..503de5a 100644
--- a/src/practice01/Prob4.java
+++ b/src/practice01/Prob4.java
@@ -1,9 +1,45 @@
 package practice01;
 
+//4번 문제
+class Prob4 extends TaskFactory{
 
-public class Prob4 {
-
-	public static void main(String[] args) {
+	
+	String str = null;
+	
+	
+	@Override
+	public void input() {
+		super.input();
+		System.out.println("문자열을 입력하시오");
+		str = sc.nextLine();
 	}
 
+
+	@Override
+	public void solve() {
+		
+	}
+	
+	@Override
+	public void print() {
+		super.print();		
+		
+		for(int i=0; i<str.length(); ++i) {
+			
+			for(int j=0; j < i+1 ; ++j) {
+				
+				System.out.print(str.charAt(j));
+				
+			}
+			
+			System.out.println();
+			
+		}
+		
+		
+	}
+	
+	
+	
 }
+
diff --git a/src/practice01/Prob5.java b/src/practice01/Prob5.java
index d8d08ad..92ee58c 100644
--- a/src/practice01/Prob5.java
+++ b/src/practice01/Prob5.java
@@ -1,7 +1,67 @@
 package practice01;
 
-public class Prob5 {
+import java.util.HashSet;
 
-	public static void main(String[] args) {
+//5번 문제
+public class Prob5 extends TaskFactory{
+
+	private final HashSet<Integer> stand = new HashSet<>();
+	private final int MAX = 100;
+	private String numStr = null;
+
+	@Override
+	public void input() {
+		super.input();
+		stand.add(3);
+		stand.add(6);
+		stand.add(9);
+
+		
+	}
+	
+	@Override
+	public void solve() {
+		
+		for(int i=1; i<MAX+1; ++i) {
+			
+			int count = 0;
+			numStr = String.valueOf(i);
+			
+
+			for(int j=0; j<numStr.length(); ++j) {
+
+				if(stand.contains(new Integer(numStr.substring(j, j+1)))){
+				
+					count++;
+					
+				}
+				
+			}
+			
+			if(count == 0) {
+				continue;
+			}
+			
+			this.print(i, count);
+			
+		}
+		
+		
 	}
-}
+
+
+	public void print(int n, int clap) {
+		
+		
+		System.out.print("현재 번호..." + n + " 박수 : ");
+		for(int i=0; i<clap; ++i) {
+			
+			System.out.print(" 짝 ");
+			
+		}
+		System.out.println();
+		
+	}
+
+	
+}
\ No newline at end of file
diff --git a/src/practice01/Task.java b/src/practice01/Task.java
new file mode 100644
index 0000000..2a3ddea
--- /dev/null
+++ b/src/practice01/Task.java
@@ -0,0 +1,7 @@
+package practice01;
+
+public interface Task {
+	
+	abstract void solve();
+	
+}
diff --git a/src/practice01/TaskFactory.java b/src/practice01/TaskFactory.java
new file mode 100644
index 0000000..3479fd5
--- /dev/null
+++ b/src/practice01/TaskFactory.java
@@ -0,0 +1,27 @@
+package practice01;
+
+import java.util.Scanner;
+
+abstract class TaskFactory implements Task{
+	
+	protected final Scanner sc = new Scanner(System.in);
+	protected int input = 0;
+	protected int answer = 0;
+	
+	//Template Method
+
+	public void input() {};
+	public void print() {}
+	
+	@Override
+	protected void finalize() throws Throwable {
+		sc.close();
+		super.finalize();
+		
+	};
+	
+	
+	
+	
+	
+}
\ No newline at end of file