Figure out how many sodas Jerry drinks after 1 week by dividing the starting number of sodas by 2: 48 sodas / 2 = <<48/2=24>>24 sodas
Now repeat the process to figure out how many soda he drinks after 2 weeks: 24 sodas / 2 = <<24/2=12>>12 sodas
Repeat the process one more time to find the number of sodas after 3 weeks: 12 sodas / 2 = <<12/2=6>>6 sodas. It takes Jerry 3 weeks to get down to 6 sodas.
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