Hey,

The GAT-B 2021 admission exam will be administered entirely online. The GAT-B 2021 question paper contains 100 multiple-choice questions, of which the candidates must attempt 60. According to the GAT-B exam pattern marking scheme, each correct answer is worth three points, while each erroneous response is worth one point.

So, you need to must attempt 60 questions out of 100. This is the minimum requirement. However, it all depends upon you whether you want to attempt more questions, then, you can do so.

Know more about it over here: https://university.careers360.com/exams/gat-b