Delhi University almost every year comes up with a different set of rules and regulations. 

So even though you can get admission by securing 2.5% more than the declared cut off, however, the final list for General candidates was 97.25% last year. You might have to score a 99.75% in your class 12th examinations. 

In case cut offs increase, you will need a perfect 100 in 4 subjects. So getting in is really difficult.

If you are not from the general category, then the cut offs will be lower and you might get through even without mathematics.

However, in the beginning, the admission requirements change often, hence you may never know that some small changes in the rules might get you in. So always follow the official website of DU for any updates.