The answer is plain No. The recent selection of Vidit Garg at IIM Ahmedabad who scored 89.67 percentile in CAT refutes all such claims that a student got to score 99 percentile for selection to top IIMs. Vidit not only received a call from IIM Ahmedabad, but was also able to convert his call.
In sharp contrast to Vidit Garg's story, we have a quora user's story who despite having 99+ percentile could not get a call from IIM Ahmedabad. Although with the establishment of several newer IIMs the scenario has changed. However, the fact remains that scoring 99+ percentile is not enough for a call from the IIMs reason being the varied shortlisting criteria.
Each IIM has a separate shortlisting criteria which may include a candidate's CAT percentile, academic performance, work experience, regional and gender diversity etc. There is a certain weightage assigned to each criteria based upon which the shortlist for interview and writing test. So even though someone scores 99+ percentile in CAT, they may not get a call because of their poor academic record.
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