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MediumBrain Teasers
Two Eggs, 100 Floors
GoogleGoldman Sachs
You have 2 identical eggs and a 100-floor building. An egg breaks if dropped from floor F or above. Minimise the number of drops in the worst case needed to find F with certainty. How many drops?
Hints
First drop high, then shorten the gaps each time.
Solve n(n+1)/2 ≥ 100.
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