diff --git a/1_sum.py b/1_sum.py
new file mode 100644
index 0000000..900a728
--- /dev/null
+++ b/1_sum.py
@@ -0,0 +1,5 @@
+sum=0
+for i in range(1,500):
+    if (i%5==0)and(i%7!=0):
+        sum=sum+i
+print(sum)
diff --git a/2_area.py b/2_area.py
new file mode 100644
index 0000000..a577b1b
--- /dev/null
+++ b/2_area.py
@@ -0,0 +1,8 @@
+l=6
+w=8
+h=10
+fl=1.15*6
+fw=1.15*8
+fh=1.15*10
+a=2*(fw*fh+fh*fl+fl*fw)
+print(a)
diff --git a/3_sort.py b/3_sort.py
new file mode 100644
index 0000000..ecde32c
--- /dev/null
+++ b/3_sort.py
@@ -0,0 +1,6 @@
+list2=['Potter','Fred','Greg','George','Voldemort','Sirius','Dumbledore']
+list1=['Ron','Hermione','Harry','Professor','Dobby','The House Elf','Potter','Granger','Lockhart','Weasly']
+print(sorted(list1)+list2)
+
+
+
diff --git a/4_pythagorean_triplet.py b/4_pythagorean_triplet.py
new file mode 100644
index 0000000..75cf0a6
--- /dev/null
+++ b/4_pythagorean_triplet.py
@@ -0,0 +1,7 @@
+for a in range(1,1000):
+	for b in range(a+1,1000):
+		c=1000-(a+b)
+		if(a**2)+(b**2)==(c**2):
+			if a+b+c==1000:
+				print(a*b*c)
+				break
diff --git a/5_lcm.py b/5_lcm.py
new file mode 100644
index 0000000..649f379
--- /dev/null
+++ b/5_lcm.py
@@ -0,0 +1,12 @@
+def gcd(a,b):
+    while b:
+        a,b=b,a%b
+    return a
+
+def lcm(a,b):
+    return (a*b)//gcd(a,b)
+    
+x=1
+for i in range(2,21):
+    x=lcm(x,i)
+print(x)
diff --git a/6_prime.py b/6_prime.py
new file mode 100644
index 0000000..3ef12ca
--- /dev/null
+++ b/6_prime.py
@@ -0,0 +1,12 @@
+def isPrime(x):
+	for i in range(2,int(x**0.5)+1):
+		if(x%i==0):
+			return False
+	return True		
+
+def printPrimes(n):
+	print("primes are")
+	for i in range(2,n+1):
+		if(isPrime(i)):
+			print(i)
+printPrimes(9999)
diff --git a/7_palindrome.py b/7_palindrome.py
new file mode 100644
index 0000000..5bc2883
--- /dev/null
+++ b/7_palindrome.py
@@ -0,0 +1,6 @@
+str1=input("enter a string:") 
+str1_rev=str(str1[::-1]) 
+if(str1==str1_rev): 
+print("palindrome") 
+else: 
+print("not  a palindrome")