diff --git a/krishnamurthy.py b/krishnamurthy.py
new file mode 100644
index 0000000..f52c47e
--- /dev/null
+++ b/krishnamurthy.py
@@ -0,0 +1,24 @@
+def factorial(n) : 
+	fact = 1; 
+	while (n != 0) : 
+		fact = fact * n; 
+		n = n - 1
+	return fact 
+
+def isKrishnamurthy(n) : 
+	sum = 0
+	temp = n 
+	while (temp != 0) : 
+
+		sum = sum + factorial( temp % 10) 
+
+		temp = temp / 10; 
+		
+	return (sum == n) 
+
+n = 145
+if (isKrishnamurthy(n)) : 
+	print "YES"
+else : 
+	print "NO"
+
diff --git a/perfect.py b/perfect.py
new file mode 100644
index 0000000..1fd22ca
--- /dev/null
+++ b/perfect.py
@@ -0,0 +1,11 @@
+# Python Program to find Perfect Number using For loop
+
+Number = int(input(" Please Enter any Number: "))
+Sum = 0
+for i in range(1, Number):
+    if(Number % i == 0):
+        Sum = Sum + i
+if (Sum == Number):
+    print(" %d is a Perfect Number" %Number)
+else:
+    print(" %d is not a Perfect Number" %Number)
\ No newline at end of file
diff --git a/special_twodigit.py b/special_twodigit.py
new file mode 100644
index 0000000..7616181
--- /dev/null
+++ b/special_twodigit.py
@@ -0,0 +1,22 @@
+def specialNumber(n): 
+  
+    # Checking whether entered 
+    # number is 2 digit or not 
+    if (n < 10 or n > 99):  
+        print("Invalid Input! Number", 
+              " should have 2 digits only") 
+    else: 
+        first = n // 10
+        last = n % 10
+        sum = first + last  
+        pro = first * last  
+        if ((sum + pro) == n): 
+            print(n ," is a Special ", 
+                   "Two-Digit Number") 
+        else: 
+            print(n , " is Not a ", 
+                "Special Two-Digit Number") 
+          
+# Driver code 
+n = 59
+specialNumber(n) 
\ No newline at end of file
diff --git a/strong.py b/strong.py
new file mode 100644
index 0000000..a13a778
--- /dev/null
+++ b/strong.py
@@ -0,0 +1,16 @@
+sum1=0
+num=int(input("Enter a number:"))
+temp=num
+while(num):
+    i=1
+    f=1
+    r=num%10
+    while(i<=r):
+        f=f*i
+        i=i+1
+    sum1=sum1+f
+    num=num//10
+if(sum1==temp):
+    print("The number is a strong number")
+else:
+    print("The number is not a strong number")
\ No newline at end of file