Numbers display issue

Hello,


I have a Samsung laptop having windows​ 8 version.
In Ms word document,
When I typed the word with the help of Shruti font in a Gujarati language the word was displayed on the screen but as and when I typed the number like 2017or else It displayed some other word which was typed earlier instead of showing number which was typed.
Num lock also checked by me it is proper.
I think any of setting is not proper or any key pressed unknowingly which do not allowed to type numbers on screen.