diff --git a/BigCountries.py b/BigCountries.py
new file mode 100644
index 0000000..a36536e
--- /dev/null
+++ b/BigCountries.py
@@ -0,0 +1,7 @@
+import pandas as pd
+
+def big_countries(world: pd.DataFrame) -> pd.DataFrame:
+    big_count=  world[(world['population'] >= 25000000) | (world['area'] >= 3000000)]
+    return big_count[['name', 'population', 'area']]
+
+    
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diff --git a/CustomerWhoNeverOrder.py b/CustomerWhoNeverOrder.py
new file mode 100644
index 0000000..3acb02b
--- /dev/null
+++ b/CustomerWhoNeverOrder.py
@@ -0,0 +1,6 @@
+import pandas as pd
+
+def find_customers(customers: pd.DataFrame, orders: pd.DataFrame) -> pd.DataFrame:
+    df = customers.merge(orders , left_on = 'id' , right_on = 'customerId', how = 'left')
+    df = df[df['customerId'].isna()]
+    return df[['name']].rename(columns = {'name' : 'Customers'})
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diff --git a/MakeAPandasDataFrameWithTwo-dimensionalList.py b/MakeAPandasDataFrameWithTwo-dimensionalList.py
new file mode 100644
index 0000000..0c2050f
--- /dev/null
+++ b/MakeAPandasDataFrameWithTwo-dimensionalList.py
@@ -0,0 +1,10 @@
+# import pandas as pd 
+import pandas as pd  
+    
+# List1  
+lst = [['Geek', 25], ['is', 30], 
+       ['for', 26], ['Geeksforgeeks', 22]] 
+
+# creating df object with columns specified    
+df = pd.DataFrame(lst, columns =['Tag', 'number']) 
+print(df )
\ No newline at end of file
diff --git a/RecyclableAndLowFatProducts.py b/RecyclableAndLowFatProducts.py
new file mode 100644
index 0000000..59a805a
--- /dev/null
+++ b/RecyclableAndLowFatProducts.py
@@ -0,0 +1,6 @@
+import pandas as pd
+
+def find_products(products: pd.DataFrame) -> pd.DataFrame:
+    prod= products[(products["low_fats"]=="Y")& (products["recyclable"]=="Y")]
+    return prod[['product_id']]
+    
\ No newline at end of file