Tony has a terrible toothache and decides to buy some painkillers from the store.  He picks up a bottle of 50 pills and takes them home.  He takes 2 pills each day three times a day for the first 2 days, before cutting this amount in half for the next 3 days.  On the sixth day, he takes a final 2 pills in the morning and ends up feeling better.  How many pills are left in the bottle?
How many pills does Tony take in total? ** Tony starts with 50 pills and takes 2 pills each 3 times a day, meaning he takes 2*3=6 pills in total.
How many pills does Tony take in total over those two days? ** Tony repeats this process for two days in total, meaning over those two days he takes 2*6= <<2*6=12>>12 pills
How many pills does Tony take in total? ** Tony then cuts down his pill usage in half, meaning he's now taking 6/2= <<6/2=3>>3 pills a day.
How many pills does Tony take in total over those three days? ** Since he repeats this process for three days, that means he takes 3*3= <<3*3=9>>9 pills for that period.
How many pills did Tony take in total? ** Adding in the two pills Tony took on the final day, that means he took 12+9+2=<<12+9+2=23>>23 pills.
How many pills are left in the bottle? ** Since there were 50 pills in the bottle to begin with, this means Tony has 50-23=<<50-23=27>>27 pills remaining.
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