diff --git a/README.md b/README.md
index 0a50ac2..11e2f9b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@ Test XLSForms for Developers
 
 form | description 
 -----|-------------
+[num-functions.xlsx](./num-functions.xlsx)    | Test the behavior of Xpath Number Functions.s
 [readonly-calc.xlsx](./readonly-calc.xlsx)    | Test whether **calculated** values update the value displayed in **readonly** widgets.
 [readonly-default.xlsx](./readonly-calc.xlsx) | Test whether **default** values are displayed in **readonly** widgets.
 [readonly-empty.xlsx](./readonly-calc.xlsx)   | Test whether **readonly** widgets are readonly, and their empty state.
+