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=Phone Screening Questions=

   


 
  Q:
There are 8 metal balls, one of them is lighter. How many times do you need to weight the balls to find the light one? Try to minimize that number.
 
 
 
 
 
 
 
 
 
 
 

A:
1. weigh all 8
2. take away 4 balls and weigh again
3. weigh two from the lighter group of balls
4. weigh 1 ball from the lighter group of 2
 
Andrew