How much age is required to apply for Indian Administrative Services exam and also let me know further details of exam?

As per your concern I will let you know Indian Administrative Services exam details and age limit required to apply for the exam.

Eligibility
The candidate must hold a degree of any University that is recognized by the state or central government. A degree received through Correspondence Education or Distance Education.

A degree from an Open University

A qualification recognized by the Government of India as being equivalent to either of the above

Age Limit
General Minimum 32 Years

OBC Minimum 35 years

SC / ST Minimum 37 Years

PH Gen-42 minimum Years OBC-45 maximum Years SC/ST-47 Years

J & K Domicile Gen-37 minimum Years OBC-40 maximum Years SC/ST-42 minimum Years PH-50 Years maximum

EX-Servicemen Gen-37 minimum Years OBC-40 maximum Years SC/ST-42 Years

Disabled Defence Services Personnel conditional Gen-37 minimum Years OBC-40minimum Years SC/ST-42 maximum Years

List of Services
Following are the services which one gets on qualifying the Civil Service Examination.

All India Services
Indian Administrative Service
Indian Police Service

Group A Services
Indian Audit and Accounts Service
Indian Civil Accounts Service
Indian Corporate Law Service
Indian Defence Accounts Service
Indian Defence Estates Service
Indian Foreign Service
Indian Information Service
Indian Ordnance Factories Service
Indian Post & Telecommunication Accounts and Finance Service
Indian Postal Service
Indian Railway Accounts Service
Indian Railway Personnel Service
Indian Railway Traffic Service
Indian Revenue Service (Income Tax)
Indian Revenue Service (CBEC)
Indian Trade Service
Railway Protection Force

Group B Services
Armed Forces Headquarters Civil Service
Delhi, Andaman and Nicobar Islands Civil Service
Delhi, Andaman and Nicobar Islands Police Service
Pondicherry Civil Service
Pondicherry Police Service

List of Languages
The examination is offered in the following languages, with the name of the script in brackets:

Assamese (Assamese)
Bengali (Bengali)
Bodo (Devanagari)
Dogri (Devanagari)
English (English)
Gujarati (Gujarati)
Hindi (Devanagari)
Kannada (Kannada)
Kashmiri (Persian)
Konkani (Devanagari)
Maithili (Devanagari)
Malayalam (Malayalam)
Manipuri (Bengali)
Marathi (Devanagari)
Nepali (Devanagari)
Oriya (Oriya)
Punjabi (Gurumukhi)
Sanskrit (Devanagari)
Santhali (Devanagri or Ol Chiki)
Sindhi (Devanagari or Arabic)
Tamil (Tamil)
Telugu (Telugu)
Urdu (Persian)

Optional subjects
Agriculture
Animal Husbandry and Veterinary Science
Anthropology
Botany
Chemistry
Civil Engineering
Commerce and Accountancy
Economics
Electrical Engineering
Geography
Geology
History
Law
Literature of any one of the non-English languages listed above
Management
Mathematics
Mechanical Engineering
Medical Science
Philosophy
Physics
Political Science and International Relations
Psychology
Public Administration
Sociology
Statistics
Zoology