The Quant Zone
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19/02/2026
https://youtube.com/shorts/rd__Wtufp5Y
You Have 5 Seconds… 93 × 107 GO! ⏳ Follow for daily 30-second brain hacks 🚀
15/01/2026
https://www.youtube.com/watch?v=9D8j4ecuOOw
Number of Mistakes in a Book Puzzle | Probability & Set Theory Interview Question ☕ Support The Quant Zone:https://buymeacoffee.com/thequantzoneVideo Editor: https://www.linkedin.com/in/manish-kaparwan/Two readers find different numbers of...
Four people must cross a dark, narrow tunnel with only one torch.
Only two can walk at a time, and each person walks at a different speed.
Sounds simple? It isn’t.
In this video, we break down the famous Tunnel and Torch puzzle, starting with a common but inefficient approach—and then reveal the optimal strategy that minimizes total time. This problem tests logical thinking, optimization, and interview-style reasoning, making it a favorite in quant, tech, and consulting interviews.
If you enjoy brain teasers, probability puzzles, and sharp problem-solving challenges, this one will stretch your thinking.
In this video, we solve the classic Two Glass Balls and 100 Floors brain teaser — a problem frequently asked in quant, software engineering, and data science interviews.
You’re given:
• A 100-floor building
• Two identical glass balls
• A hidden floor Y where the balls start breaking
The challenge is to find Y with the minimum number of drops in the worst case.
We break down:
• Why naïve and binary-search strategies fail
• The optimal decreasing-step strategy
• How the solution guarantees the answer in just 14 drops
• The intuition behind the formula N(N+1)/2
Perfect for:
Quant interview prep • FAANG interviews • Brain teaser practice • Algorithm intuition
If you enjoy solving interview-style puzzles, consider subscribing for more quant and problem-solving content.
19/12/2025
Probability Puzzle: Random Subsets A, B of a Set — Find P(A ⊆ B) (Set Theory Trick!) ☕ Support The Quant Zone:https://buymeacoffee.com/thequantzoneVideo Editor: https://www.linkedin.com/in/manish-kaparwan/In this video, we solve a classic pro...
15/12/2025
https://youtube.com/shorts/0qIIsoiElQU
This Simple Math Rule Guarantees a Pair 😮 | Pigeonhole Principle #shorts #probability #maths No formulas. No complexity.Just a powerful math idea that always works — the Pigeonhole Principle.Watch till the end for a surprisingly simple sock puzzle. ...
18/11/2025
https://youtube.com/shorts/2GBUjokCBWo?feature=share
Solve This Genius Weight Puzzle in ONE Weighing! 🧠💡 | Coin Weighing Trick Explained #brainteaser Ever wondered how to find out which bag has which coins using just one weighing? 🪙🤯 This powerful logic trick helps you identify 9g, 10g, and 11g coin bags...
The Probability Puzzle Everyone Gets Wrong — Pancake Edition
Link to Full video: https://youtu.be/lKWbDBeKiAo
Full video: https://youtu.be/PyFhHvjdDfo
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