diff --git a/Maths/FibonacciSequenceRecursion.py b/Maths/FibonacciSequenceRecursion.py
new file mode 100644
index 000000000..a97bb8b3f
--- /dev/null
+++ b/Maths/FibonacciSequenceRecursion.py
@@ -0,0 +1,18 @@
+# Fibonacci Sequence Using Recursion
+
+def recur_fibo(n):
+    return n if n <= 1 else (recur_fibo(n-1) + recur_fibo(n-2))
+    
+def isPositiveInteger(limit):
+    return limit >= 0
+
+def main():
+    limit = int(input("How many terms to include in fibonacci series: "))
+    if isPositiveInteger(limit):
+        print(f"The first {limit} terms of the fibonacci series are as follows:")
+        print([recur_fibo(n) for n in range(limit)])
+    else:
+        print("Please enter a positive integer: ")
+
+if __name__ == '__main__':
+    main()
diff --git a/Maths/GreaterCommonDivisor.py b/Maths/GreaterCommonDivisor.py
new file mode 100644
index 000000000..15adaca1f
--- /dev/null
+++ b/Maths/GreaterCommonDivisor.py
@@ -0,0 +1,15 @@
+# Greater Common Divisor - https://en.wikipedia.org/wiki/Greatest_common_divisor
+def gcd(a, b):
+    return b if a == 0 else gcd(b % a, a)
+
+def main():
+    try:
+        nums = input("Enter two Integers separated by comma (,): ").split(',')
+        num1 = int(nums[0]); num2 = int(nums[1])
+    except (IndexError, UnboundLocalError, ValueError):
+        print("Wrong Input")
+    print(f"gcd({num1}, {num2}) = {gcd(num1, num2)}")
+
+if __name__ == '__main__':
+    main()
+
diff --git a/Maths/fibonacciSeries.py b/Maths/fibonacciSeries.py
deleted file mode 100644
index 5badc6a82..000000000
--- a/Maths/fibonacciSeries.py
+++ /dev/null
@@ -1,16 +0,0 @@
-# Fibonacci Sequence Using Recursion
-
-def recur_fibo(n):
-   if n <= 1:
-       return n
-   else:
-       return(recur_fibo(n-1) + recur_fibo(n-2))
-    
-limit = int(input("How many terms to include in fibonacci series: "))
-
-if limit <= 0:
-   print("Please enter a positive integer: ")
-else:
-   print(f"The first {limit} terms of the fibonacci series are as follows")
-   for i in range(limit):
-       print(recur_fibo(i))
diff --git a/Maths/gcd.py b/Maths/gcd.py
deleted file mode 100644
index 0f0ba7dce..000000000
--- a/Maths/gcd.py
+++ /dev/null
@@ -1,12 +0,0 @@
-def gcd(a, b):  
-    if a == 0 : 
-        return b  
-      
-    return gcd(b%a, a)
-
-def main():
-	print(gcd(3, 6))
-
-
-if __name__ == '__main__':
-	main()