diff --git a/misc/challenges/interest.py b/misc/challenges/interest.py
new file mode 100644
index 0000000..44a1730
--- /dev/null
+++ b/misc/challenges/interest.py
@@ -0,0 +1,5 @@
+euros = 1000
+interest = 1.05
+years = 3
+
+print euros*interest**years