diff --git a/Q1.py b/Q1.py
new file mode 100644
index 0000000..b587443
--- /dev/null
+++ b/Q1.py
@@ -0,0 +1,8 @@
+import string
+
+n = int(input("Enter the number of letters in each line:"))
+with open("letters.txt", "w") as f:
+    alphabet = string.ascii_letters
+    for i in range(0, len(alphabet), n):
+        letters = [alphabet[i:i + n] + "\n"]
+        f.writelines(letters)
diff --git a/Q2.py b/Q2.py
new file mode 100644
index 0000000..872a7e9
--- /dev/null
+++ b/Q2.py
@@ -0,0 +1,4 @@
+import string
+char = list(string.ascii_uppercase)
+for i in range(len(char)):
+   open(f"{char[i]}.txt", 'x')
diff --git a/Q3.py b/Q3.py
new file mode 100644
index 0000000..f6af8dc
--- /dev/null
+++ b/Q3.py
@@ -0,0 +1,22 @@
+from math import gcd
+from functools import reduce
+
+
+def lcm_function(list):
+    return reduce(lambda a, b: a * b // gcd(a, b), list)
+
+
+list = []
+for i in range(1, 5):
+    try:
+        num = int(input(f"Enter number {i} : "))
+        num != None
+        list.append(num)
+
+    except ValueError:
+        print("Value can't be empty or non numerical")
+        exit()
+
+print(list)
+result = lcm_function(list)
+print("The L.C.M is :", result)
diff --git a/Q4/__pycache__/addition.cpython-311.pyc b/Q4/__pycache__/addition.cpython-311.pyc
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index 0000000..78dea82
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diff --git a/Q4/__pycache__/division.cpython-311.pyc b/Q4/__pycache__/division.cpython-311.pyc
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index 0000000..5dd8c42
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diff --git a/Q4/__pycache__/multiplication.cpython-311.pyc b/Q4/__pycache__/multiplication.cpython-311.pyc
new file mode 100644
index 0000000..9afb799
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diff --git a/Q4/__pycache__/subtraction.cpython-311.pyc b/Q4/__pycache__/subtraction.cpython-311.pyc
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index 0000000..1700f36
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diff --git a/Q4/addition.py b/Q4/addition.py
new file mode 100644
index 0000000..43cae1a
--- /dev/null
+++ b/Q4/addition.py
@@ -0,0 +1,3 @@
+def add(n1,n2):
+    result = n1+n2
+    return result
\ No newline at end of file
diff --git a/Q4/division.py b/Q4/division.py
new file mode 100644
index 0000000..cb26248
--- /dev/null
+++ b/Q4/division.py
@@ -0,0 +1,3 @@
+def div(n1, n2):
+    result = n1/n2
+    return result
diff --git a/Q4/main.py b/Q4/main.py
new file mode 100644
index 0000000..81fcaba
--- /dev/null
+++ b/Q4/main.py
@@ -0,0 +1,47 @@
+import math
+from addition import add
+from subtraction import sub
+from multiplication import multi
+from division import div
+
+
+i = "Y"
+while i == "Y":
+    while True:
+        try:
+            num1 = float(input("\nEnter the first number:"))
+            num2 = float(input("Enter the second number:"))
+            break
+        except ValueError:
+            print("Value can't be empty or non numerical")
+
+    print(
+        "\nSelect operation:(You can select by pressing the number next to the operation)")
+    print("1-Addition\n2-Subtraction\n3-Multiplication\n4-Divison\n")
+    while True:
+        try:
+            select = int(input("Enter your choice:"))
+            assert select in [1, 2, 3, 4]
+            break
+        except:
+            print(
+                "Invalid input, Value can't be empty or non numerical, Make sure you select the correct number of the operation"
+            )
+
+    if select == 1:
+        result = add(num1, num2)
+    elif select == 2:
+        result = sub(num1, num2)
+    elif select == 3:
+        result = multi(num1, num2)
+    else:
+        result = div(num1, num2)
+
+    print("\nThe result is:", math.ceil(result))
+    while True:
+        try:
+            i = input("\nPress 'Y to continue or 'N to exit': ").upper()
+            assert i in ["Y", "N"]
+            break
+        except:
+            print("Please enter either 'Y' or 'N'")
diff --git a/Q4/multiplication.py b/Q4/multiplication.py
new file mode 100644
index 0000000..83f5813
--- /dev/null
+++ b/Q4/multiplication.py
@@ -0,0 +1,3 @@
+def multi(n1, n2):
+    result = n1*n2
+    return result
diff --git a/Q4/subtraction.py b/Q4/subtraction.py
new file mode 100644
index 0000000..a0303ec
--- /dev/null
+++ b/Q4/subtraction.py
@@ -0,0 +1,3 @@
+def sub(n1, n2):
+    result = n1-n2
+    return result