How can I show only numeric number in captcha?

Hi sir,

captcha is only showing alphabets but I need to show only numbers. please can you tell me how can i do that

Sorry but numeric captcha isn't available yet. You can only use the regular captcha field on your form that shows alphabets or you may consider the following captcha widgets: 

https://widgets.jotform.com/widget/google_recaptcha

https://widgets.jotform.com/widget/drawing_captcha

Related Guide: How to Add a Captcha Field