Limiting captchca to MATH

  • Hi,
    let me say thank you for creating such a plugin. Its a lot of work. I am trying to limit the captcha to math for an international audience. Normally i would locate the code and limit the allowed variables( number and letters ect. But i cannot seem to locate these in your files. Can you help me please? Your plugin does everything i require except for this last little bit. I have a deadline for this project looming ominously. Many thanks and..

    Kindest Regards
    Conor

    https://www.ads-software.com/plugins/pie-register/

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