Analytics associate interview questions shared by candidates
Given 4 people who each take different times to cross a bridge (10 mins, 5mins, 2mins and 1 min), what's the least amount of time taken to cross the bridge if only 2 can cross at a time and a flashlight is needed for each trip across.
Kinda tricky. It's 17 minutes. First 1,2 cross, 1 takes the flashlight back. (=3 mins) Then 10,5 cross. 2 (who is still on the other side) takes the flashlight back. (=another 12 mins) Then 1,2 cross again. (=another 2 mins) So it's 3+12+2=17 minutes in total.
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