Eight pills one is poisonous and weights slightly more how can you find poisoned pill?

2 comments to “Eight pills one is poisonous and weights slightly more how can you find poisoned pill?”?

1. To the comment from 2023: you can only use the scale twice, Ignorant.

2. weigh two groups of three pills each
   if they weigh the same, the poison pill is in the group not yet weighed
   If they weigh different, whichever pan has the heavier load of 3 pills contains the poison pill

   Once you know which of the three groups has the poison pill:
   Weigh two pills from that group
   If they weigh the same, the poison pill is the one not being weighed
   If they weigh different, the heavier pan has the poison pill
   Done!