You are not in “Keypad” mode where the numeric keys (top row) of the keyboard will behave like the PC numeric keypad. Use Command-K to enter this mode.
You are in “Keypad” mode where the numeric keys (top row) of the keyboard behave like the PC numeric keypad. Use Command-K to exit this mode.
You are not in “Function” mode where the numeric keys (top row) of the keyboard behave like PC function keys F1-F12. Use Command-F to enter this mode.
You are in “Function” mode where the numeric keys (top row) of the keyboard behave like PC function keys F1-F12. Use Command-F to exit this mode.