It's a form of CAPTCHA... a more reliable method, IMO.
On Jul 18, 5:44 pm, Anand <[email protected]> wrote: > hi, > > if see some site like fields in registration > > * (Spam protection) What is the sum of 15 + 17? > > Human check > Some simple math 1+19 > > Why want to like this ?,if u know this
