Someone to draft Maths questions based on a template

i am creating my own maths tutoring business
- I want a series of questions written for me - roughly 500
- I have hundreds of questions but need to change them to make them mine
- So you would take the existing sheets and re-write the questions eg in the existing attachment you may say +2 instead of the +9, then go '1/2 of it' instead of '1/4 of it', then x5 instead of x3 etc etc - see attachement
I would provide all the templates - you would simply cross out the existing question and handwrite the new versions and scan/PDF them back to me