ATMA

There is nothing called tougher to crack or easy to crack. This view depends upon the preparation of the exam you are giving. There are a number of exams conducted in India for the MBA type courses. Exams like CAT, XAT, GMAT, MAT, IBSAT, NMAT, SNAP, etc. have some minor tweaking and variations apart from the main sections. Each of these exams has a quantitative aptitude, verbal reasoning, logical reasoning and data interpretation, apart from GK or essay writing section in some of the exams. So, you have to prepare accordingly for these exams either by taking coaching classes or correspondence course or by self-preparation or by following recommended books. After you have prepared for the most difficult level questions, you may try to get some question banks for the specific exam you are targeting either offline mode I.e. books on exams or online mode i.e. free question banks websites or paid question banks for practice.

Reasoning section, the candidates can practice similar tests to be precise and accurate. Since for this section, there is no precise formula, the candidates can solve as many mock tests as possible. Simple preparation for this section can be done by solving puzzles and riddles.
Quantitative section, the candidates can prepare from the NCERT books or secondary and Higher secondary level mathematics books. Candidates can also opt for solving mock tests, previous years ATMA question papers and CAT Question papers.
Lastly, for the Verbal Section, the candidates can brush up their grammar, vocabulary and increase their reading speed. Reading from various topics can give an advantage while dealing with long passages. It is essential that students refer to previous years question papers and rely on mock tests, as this will make them familiar with the paper pattern and will give them an idea about the type of questions asked. Thus, students are better prepared for the examination.

There are many coaching institutes providing guidance to entrance exams. T.I.M.E., IMS and Career Launcher are the preferred coaching centers for the exam.
You may enroll in these institutes, they provide mock papers and more specific material for the exam once the syllabus is completed.
Make sure you solve the test series to have a feel of how the actual exam is.
There are many other good institutes but it all depends on which batch they give you. Make sure to enroll for a good batch with reputed faculty.
Most important is the batch you are enrolling, these institutes have different batches based on test or academics. Be sure you enroll for a good batch with good faculty. A coaching can only give you direction, it is you who has to work and study.
How to crack ATMA- Tips and Tricks
Set your plan right. Work on your plan and identify your weakness and strength. Set your plan agile and keep buffer time for revision and solving mock test papers.
Be focused and calm. For the last month keep all the formulas and tricks handy and revise on a daily basis.