Jumbled numbers and text

When i am typing on my laptop some of the letters appear as numbers

Look for the numlock light somewhere near the keyboard. It's the light with a drawing of a lock with a 9.

If it's lit up. turn it off by pressing the numlock key.

Turning it back on will activate the number keypad (consists of 9-11 keys in the middle of the keyboard). So instead of getting letters, numbers appear.

Hope this is your case. Kindly rate me if the issue got fixed.