diff --git a/Task 3/Q1/IIT2025262/calc.txt b/Task 3/Q1/IIT2025262/calc.txt
new file mode 100644
index 0000000..b6b2bd6
--- /dev/null
+++ b/Task 3/Q1/IIT2025262/calc.txt	
@@ -0,0 +1,2 @@
+A calculator is an tool that performs mathematical operations quickly.
+It is used to make calculations faster and reduce human errors in maths and daily tasks.
\ No newline at end of file
diff --git a/Task 3/Q1/test.txt b/Task 3/Q1/test.txt
new file mode 100644
index 0000000..2ee89e5
--- /dev/null
+++ b/Task 3/Q1/test.txt	
@@ -0,0 +1 @@
+What is a calculator?
\ No newline at end of file
diff --git a/Task 3/Q2/IIT2025262/calculator.cpp b/Task 3/Q2/IIT2025262/calculator.cpp
new file mode 100644
index 0000000..a6b5981
--- /dev/null
+++ b/Task 3/Q2/IIT2025262/calculator.cpp	
@@ -0,0 +1,21 @@
+#include<iostream>
+using namespace std;
+int main(){
+    int a,b;
+    cin>>a>>b;
+    int sum=a+b;
+    int diff=a-b;
+    int prod=a*b;
+    float div=a/b;
+    cout<<"Enter s-sum, d-diff,p-prod,d-div";
+    string s;
+    cin>>s;
+    if(s=="s")
+        cout<<sum;
+    if(s=="d")
+        cout<<diff;
+    if(s=="p")
+        cout<<prod;
+    if(s=="d")
+        cout<<div;
+}
\ No newline at end of file
diff --git a/Task 3/Q3/armstrong.cpp b/Task 3/Q3/armstrong.cpp
new file mode 100644
index 0000000..6c076f6
--- /dev/null
+++ b/Task 3/Q3/armstrong.cpp	
@@ -0,0 +1,33 @@
+#include <iostream>
+#include <cmath>
+using namespace std;
+
+int main() {
+    int num, originalNum, remainder;
+    int n = 0;          
+    double result = 0;  
+
+    cout << "Enter a number: ";
+    cin >> num;
+    originalNum = num;
+
+    int temp = num;
+    while (temp != 0) {
+        temp /= 10;
+        n++;
+    }
+
+    temp = num;
+    while (temp != 0) {
+        remainder = temp % 10;
+        result += pow(remainder, n);
+        temp /= 10;
+    }
+
+    if ((int)result == originalNum)
+        cout << originalNum << " is an Armstrong number.";
+    else
+        cout << originalNum << " is NOT an Armstrong number.";
+
+    return 0;
+}
diff --git a/Task 3/Q4/palindrome.cpp b/Task 3/Q4/palindrome.cpp
new file mode 100644
index 0000000..1838e3b
--- /dev/null
+++ b/Task 3/Q4/palindrome.cpp	
@@ -0,0 +1,29 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    string s;
+    cout << "Enter a string or number: ";
+    cin >> s;
+
+    int start = 0;
+    int end = s.length() - 1;
+
+    bool isPalindrome = true;
+
+    while (start < end) {
+        if (s[start] != s[end]) {
+            isPalindrome = false;
+            break;
+        }
+        start++;
+        end--;
+    }
+
+    if (isPalindrome)
+        cout << "It is a palindrome.";
+    else
+        cout << "It is NOT a palindrome.";
+
+    return 0;
+}
diff --git a/Task 3/Q5/prime b/Task 3/Q5/prime
new file mode 100644
index 0000000..e69de29
diff --git a/Task 3/Q5/prime.cpp b/Task 3/Q5/prime.cpp
new file mode 100644
index 0000000..88109ad
--- /dev/null
+++ b/Task 3/Q5/prime.cpp	
@@ -0,0 +1,29 @@
+#include <iostream>
+using namespace std;
+
+int main() {
+    int num;
+    cout << "Enter a number: ";
+    cin >> num;
+
+    if (num <= 1) {
+        cout << "Not a prime number.";
+        return 0;
+    }
+
+    bool isPrime = true;
+
+    for (int i = 2; i * i <= num; i++) {
+        if (num % i == 0) {
+            isPrime = false;
+            break;
+        }
+    }
+
+    if (isPrime)
+        cout << "Prime number";
+    else
+        cout << "Not a prime number";
+
+    return 0;
+}