Now I doing BA economics hons (1st year) I have no math in 10+2 and economics hons can I give DSE MA Economics entrance exam.
Are you asking for Delhi University? As per the eligibility If you are a graduate in Economics from a college in DU, you can get a direct admission provided you have performed well academically in your graduation. If you are unable to get a direct entry, are not a DU graduate or don’t have a degree in Economics, you can sit for the entrance exam that is open to all graduates. You can check the further information with the given below link.
DU M.A Economics admission
To prepare for the exam you can refer the previous year papers, If you are well prepared with your Graduation then it will be very helpful for the exam.
Good Luck!