Tribhuvan Sahkari University

The choice totally depends upon your specialization of MBA course, whether you want marketing domain, supply chain management domain, finance domain, operations domain, etc.
IRMA is better in terms of course it offers.
IRMA offers Post Graduate Diploma in Rural Management and is among the best institutes in this field in India.
So, if you have an inclination towards rural management then go for IRMA.
On the other hand, Jaipuria Institute of Management is a decent college with decent placements and offers a variety of courses. They offer specializations like PGDM in financial services, PGDM in retail management, PGDM in service management and PGDM in marketing.
Rest are the secondary factors like location, infrastructure,faculty, campus life, etc.
So, depending upon the above parameters, you can decide which college you want to choose.

Quantitative Ability
Quantative availability: The exam more closely resembles a bank PO exam then MBA exam. For quantitative ability, the best preparation to take Bank PO papers. Check for Pratiyogita Darpan under Google books, there are many previous issues. Take a copy of only quantitative section and solve it by setting time because unlike other exams the time is very limited.
English Comprehension
This is a relatively simple section as it consists of different types of questions like reading, comprehension, para, jumbling, sentence correction, and fill in the blanks. You should be solving previous year papers and mock test papers to improve your skills in English.
issues of social concern.
This is the toughest section in the paper. The questions are mainly around agriculture, environment, education, as our organization heads current affairs, NGOs. Also, development programmes are the best way to prepare for this section. Read a newspaper daily especially Hindu editorials. You should also practice online test mock test papers of GK.
Hope it helps.

Preparation can be three types: self, self plus coaching and coaching,
It depends whether you are working or a student. So, if you are working you have to prepare either by self-using the correspondence booklets or you can take the option of taking weekend coaching classes or you can buy some famous books used for the preparation of MBA entrance exams. But if you are a student then you have a good amount of time to prepare so you can use the correspondence courses and books initially for self-preparation and later can join coaching classes for brushing up your preparation with added techniques. So, any MBA entrance exam has generally three sections: quantitative aptitude, logical reasoning & data interpretation and verbal reasoning along with a study of general current affairs. So, depending on your strengths, weakness and speed prepare the three sections accordingly and nail the exam.
Note: prepare for social and rural contemporary issues thoroughly.

There is nothing such thing 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 courses. Exams like CAT, XAT, GMAT, KMAT, IBSAT, NMAT, SNAP, IRMA etc. have some minor tweaking and variations apart from the main sections. Each of these exams has 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.