diff --git a/exercises/ex10/ex10a.py b/exercises/ex10/ex10a.py
new file mode 100644
index 0000000..733c001
--- /dev/null
+++ b/exercises/ex10/ex10a.py
@@ -0,0 +1,39 @@
+"""
+Project: Selective Copy
+Page 247
+"""
+
+import sys
+import shutil
+import argparse
+from pathlib import Path
+
+parser = argparse.ArgumentParser(description='Copia selectiva')
+parser.add_argument("-e", "--ext", type=str, default='*')
+parser.add_argument("-i", "--input", type=Path, default=Path.cwd())
+parser.add_argument("-o", "--output", type=Path, required=True)
+parser.add_argument("-f", "--force", action="store_true")
+args = parser.parse_args()
+
+if not args.input.exists():
+    print("ERROR: el input no existe")
+    sys.exit(1)
+
+if args.output.is_file():
+    print("ERROR: el output es un archivo existente")
+    sys.exit(1)
+if not args.output.exists():
+    args.output.mkdir()
+
+extension = args.ext[0] != "." and f"*.{args.ext}" or f"*{args.ext}"
+
+for file in list(args.input.glob(f"**/{extension}")):
+    new_path = args.output / file.name
+    if len(set(file.parents) - set(args.output.resolve().parents)) == 0:
+        if new_path.exists() and not args.force:
+            print(f"WARN: {new_path} ya existe; no se copió")
+        elif new_path.exists() and args.force:
+            print(f"WARN: {new_path} ya existe; sobreescribiendo")
+            shutil.copy2(file, new_path)
+        else:
+            shutil.copy2(file, new_path)
diff --git a/exercises/ex10/ex10b.py b/exercises/ex10/ex10b.py
new file mode 100644
index 0000000..b6a6042
--- /dev/null
+++ b/exercises/ex10/ex10b.py
@@ -0,0 +1,4 @@
+"""
+Project: Deleting Unneeded Files
+Page 247
+"""
diff --git a/exercises/ex10/ex10c.py b/exercises/ex10/ex10c.py
new file mode 100644
index 0000000..6e12607
--- /dev/null
+++ b/exercises/ex10/ex10c.py
@@ -0,0 +1,4 @@
+"""
+Project: Filling in the Gaps
+Page 248
+"""