Management entrance tests are pretty easy to scale nowadays with loads of course material and training available that prepares you for taking the test. Infact these entrance tests are designed according to the school level mathematics and verbal skills. Since the test is a multiple answer based it becomes easier to choose the right answer instead, if we were to write the right answer it would become very tedious.
If you think that you have forgotten your 10th and 12th maths then you can always brush up with a few months preparation. Believe me its not at all difficult. As I am working the field of Management studies and the kind of study material I am surrounded with I feel, just a 3 to 4 months of diligent preparation can book your seat in the IIMs.
Mostly, the people with technical/engineering background have a tough time with the verbal and english skills required in the test and others have a difficulty in the quantitative questions. But I still hold on to the fact that just a few months of practice and efforts are enough to get the hang of the test and get a terrific score at it. Take as many mock tests or simulated tests before the actual test. It will help you analyze your accuracy level and also your speed.
CET is over, now its time to bell the CAT- Common Admission Test. The scores of Cat are utilised not just by the IIMs but many other management institutes also accept the CAT scores.
In todays world an MBA is equivalent to Graduation and Graduation is equivalent to under-graduation and under-graduation is equivalent to illiterate. So decide what you want to qualify as.