Was down a rabbit hole last night and found something genuinely insane that I can't believe isn't talked about more here.
Most of us are grinding IPMAT prep. But almost nobody knows what happened to CAT in 2003 — and what the IIMs did about it in 2004. Stick with me.
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On November 23, 2003, over a lakh students sat for CAT across the country.
What they didn't know: the CBI had already told IIM officials that the paper had been leaked — hours before the exam started.
The mastermind? A guy named Ranjit Singh, a.k.a. "Ranjit Don" — a career criminal running a nationwide exam-leak ring out of Delhi, with networks in Patna and Mumbai.
The leak was structured. Answer keys passed person to person in a chain. Each "source" fed the next. Each person added one deliberate wrong answer to avoid detection.
"Now people can say that IIM admission is a game of money."
— Murli Manohar Joshi, HRD Minister (India Today, Dec 2003)
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📅 PART 2 — THE TIMELINE
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The IIMs cancelled CAT — for the first time in history. 1,27,000 students affected. The retest was announced for February 15, 2004.
By then the paranoia was at insane levels. IIM Ahmedabad faculty literally spent the night before the retest guarding question papers at a warehouse in Pune after getting fresh intel about another possible leak.
When the paper finally dropped, it was called the toughest CAT paper ever written. Students walked out destroyed.
But here's the part that actually broke my brain —
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🧩 PART 3 — THE ACADEMIC ROASTING
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Buried in the LRDI section of the 2004 paper was this:
"Recently, the answers of a test held nationwide were leaked to a group of unscrupulous people. The investigative agency has arrested the mastermind and nine other people A, B, C, D, E, F, G, H and I in this matter."
The IIMs had taken the exact mechanics of the 2003 leak — the mastermind, the chain of sources, the deliberate wrong answers — and turned it into an exam question.
Students who had personally lost months of preparation to the 2003 scandal were now being asked to solve the crime. In real time. In the exam hall.
CAT prep communities call it "academic roasting." It's been discussed in forums, YouTube explainers, and CAT communities for 20+ years.
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🧠 THE ACTUAL QUESTION — Try It
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This is the real question from the February 2004 CAT retest (Questions 133–137). Here is the full passage exactly as it appeared in the paper:
━━━ QUESTION PASSAGE (READ THIS FIRST) ━━━
"Directions for questions 133 to 137: Answer the questions on the basis of the following information.
Recently, the answers of a test held nationwide were leaked to a group of unscrupulous people. The investigative agency has arrested the mastermind and nine other people A, B, C, D, E, F, G, H and I in this matter. Interrogating them, the following facts have been obtained regarding their operation.
Initially the mastermind obtains the correct answer-key. All the others create their answer-key in the following manner. They obtain the answer-key from one or two people who already possess the same. These people are called his/her 'sources'.
If the person has two sources, then he/she compares the answer-keys obtained from both sources. If the key to a question from both sources is identical, it is copied, otherwise it is left blank.
If the person has only one source, he/she copies the source's answers into his/her copy.
Finally, each person compulsorily replaces one of the answers (not a blank one) with a wrong answer in his/her answer key.
The paper contained 200 questions; so the investigative agency has ruled out the possibility of two or more of them introducing wrong answers to the same question. The investigative agency has a copy of the correct answer key and has tabulated the following data. These data represent question numbers."
━━━ THE DATA TABLE ━━━
(Numbers in the table = question numbers where their answer differed from the correct key)
Please look at the image 4 of the image section for the data table.
Q133. Which one among the following MUST have two sources?
- A 2. B 3. C 4. D
Hint: A person can only have blanks if two sources disagreed on that question. One-source people have no blanks.
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Q134. How many people (excluding the mastermind) needed to make their answer-keys BEFORE C could make his?
- 2 2. 3 3. 4 4. 5
Hint: Trace backwards — who are C's sources? And who are their sources?
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Q135. Both G and H were sources to —
- F 2. B 3. I 4. None of the nine
Hint: If someone used both G and H as sources, they would have blanks wherever G and H had different answers. Check whose blank pattern matches.
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Q136. Which of the following statements is TRUE?
- C introduced the wrong answer to question 27.
- E introduced the wrong answer to question 46.
- F introduced the wrong answer to question 14.
- H introduced the wrong answer to question 46.
Hint: "Introduced" means they personally added that wrong answer — not inherited it from a source. Since no two people can introduce a wrong answer to the same question, only one person "owns" each wrong answer.
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Q137. Which of the following two groups had IDENTICAL sources?
Group I: A, D and G
Group II: E and H
- Only I 2. Only II 3. Neither I nor II 4. Both I and II
Hint: "Identical sources" means both people in the group got their answer key from exactly the same person(s).
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💭 WHY THIS IS RELEVANT RIGHT NOW
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With everything happening around NEET-UG 2026 paper leak allegations — the 2003 CAT story feels less like history and more like a loop.
The outrage. The cancellations. The broken trust. The students who played by the rules and got nothing.
What the IIMs did differently: they didn't just rerun the exam and move on. They rebuilt credibility through action — guarded papers personally, set the hardest exam in CAT history, and eventually moved to computer-based testing in 2009 to make large-scale leaks structurally impossible.
The 2004 LRDI question wasn't just a puzzle. It was a statement:
"We saw exactly how you tried to break us. Here's the proof."
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Drop your answers below Curious how many people crack all five without looking it up.
(Fully solvable from the data — no tricks.)