How many places one should apply for postdoctoral position I need a suggestion in applying for postdoc position in mathjobs. In general how many places one should apply ? I mean, can my recommendation letter writers get disturbed if I apply for too many places and ask them to send email to too many places ?

Any help/suggestions will be useful.

Thanks in advance.
You should apply all the places where you want to have a job, and no more.  That may sound flip, but there's no magic number; it all depends on how many jobs are the market and what sort job you would accept.