@voyager_byte1 hour ago
I wasted time once debating a number the interviewer clearly wanted me to use. Better to check the result, not fight the prompt.
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@NickelSnack6310 hours agoBelgium
If the interviewer gives me an assumption, should I still sanity-check it?
- Case Math
Sometimes the interviewer gives me a number or assumption directly, like average price or customer volume. I usually just plug it in. Should I ever question or sanity-check numbers that come from the interviewer?
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The interviewer stepped in and did part of the math after I made a mistake. How bad is that?
- Case Math
During a practice interview I set the calculation up correctly but made an arithmetic error, and the interviewer stepped in with the number so we could keep moving. If that happens in a real interview, is it basically fatal?
Oct 6, 2026United States
Top answer
Mayank G.Coach
Mayank G.CoachNot automatically. One arithmetic mistake does not by itself determine the entire interview.
How can I prepare for a Bain interview if my math skills are very weak?
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How can I prepare for a Bain consulting interview if my math skills are very weak?
Oct 1, 2026United States
Top answerMayank G.Coach
Mayank G.CoachPrioritize the math fundamentals that actually appear in cases, then practice explaining your setup clearly under time pressure.
If I catch a unit mistake halfway through, should I restart the whole calculation?
- Case Math
I sometimes realize after two or three steps that I mixed thousands and millions. When that happens in a mock I panic and restart from the beginning even if most of the setup is right. What is the cleanest way to recover in an interview?
Oct 4, 2026United States
Top answerMayank G.Coach
Mayank G.CoachCorrect the unit at the point where the mistake occurred and restart only the affected part of the calculation.