diff --git a/IndexPoint.java b/IndexPoint.java
index 8b13789..f891930 100644
--- a/IndexPoint.java
+++ b/IndexPoint.java
@@ -1 +1,36 @@
 
+Daniel Tanta Christopher Sirait , 1301150054 , IF-39-12
+
+import java.util.Scanner;
+public class IndexPoint {
+
+    public static void main(String[] args) {
+        Scanner input = new Scanner (System.in);
+        String grade = null;
+        double uas, uts, quiz, total;
+        System.out.println("Menghitung Nilai Mahasiswa");
+        System.out.println("Masukkan Nilai UTS :");
+        uts = input.nextInt();
+        System.out.println("Masukkan Nilai UAS :");
+        uas = input.nextInt();
+        System.out.println("Masukkan Nilai Quiz :");
+        quiz = input.nextInt();
+        total = (0.35 * uts + 0.40 * uas + 0.25 * quiz);
+        if (total >= 85 && total <= 100){
+            grade = "Excellent";
+        }
+        else if (total > 75 && total < 84){
+            grade = "Very Good";
+        }
+        else if (total > 65 && total < 74){
+            grade = "Good";
+        }
+        else if (total > 50 && total < 64){
+            grade = "Accepted";
+        }
+        else if (total < 49){
+            grade = "failed";
+        }
+            System.out.println("Nilai Akhir anda "+total +", Dinyatakan "+grade);
+        }
+        }
diff --git a/PrimeNumber.java b/PrimeNumber.java
index 8b13789..c474cdd 100644
--- a/PrimeNumber.java
+++ b/PrimeNumber.java
@@ -1 +1,27 @@
+Daniel Tanta Christopher Sirait , 1301150054 , IF-39-12
 
+import java.util.Scanner;
+public class PrimeNumber {
+
+public static void main(String[] args) {
+Scanner input = new Scanner (System.in);
+System.out.println("Masukkan sebuah bilangan :");
+int bil = input.nextInt();
+boolean prima = true;
+for (int i=2; i<bil; i++){
+    
+if ((bil % i) == 0) {
+
+prima = false; break;
+
+    }
+}
+ if (prima)
+
+System.out.println(bil + " adalah bilangan PRIMA ");
+
+else
+
+System.out.println(bil + " adalah bukan bilangan PRIMA ");
+    }
+}
diff --git a/TemperatureConvert.java b/TemperatureConvert.java
index e69de29..c44155e 100644
--- a/TemperatureConvert.java
+++ b/TemperatureConvert.java
@@ -0,0 +1,28 @@
+Daniel Tanta Christopher Sirait , 1301150054 , IF-39-12
+
+import java.util.Scanner;
+
+public class TemperatureConvert {
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        int temperature, pilihan, reamur;
+        
+        System.out.println("Masukkan Pilihan anda :");
+        System.out.println("1. Fahrenheit ke Reamur");
+        System.out.println("2. Kelvin ke Reamur");
+        pilihan = input.nextInt();
+        
+        if (pilihan == 1) {
+            System.out.println("Masukkan Temperature = ");
+            temperature = input.nextInt();
+            reamur = (4/9 * (temperature - 32));
+            System.out.println("Reamur = "+reamur);
+            } 
+        else if (pilihan == 2){
+            System.out.println("Masukkan Temperature = ");
+            temperature = input.nextInt();
+            reamur = (4/5 * (temperature - 273));
+            System.out.println("Reamur = "+reamur);
+        }
+        }
+}