Each liter of water holds 1000 mL.

Mary's goal is to drink 1.5 liters of water a day, which in mL is 1.5 L * 1000 mL/L = <<1.5*1000=1500>>1500 mL

To reach her goal, Mary should drink 1500 mL / 250 mL/glass = <<1500/250=6>>6 glasses of water per day.

# Answer

6
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
To improve her health, Mary decides to drink 1.5 liters of water a day as recommended by her doctor. Mary's glasses hold 250 mL of water. How many glasses of water should Mary drink per day to reach her goal?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6
To improve her health, Mary decides to drink 1.5 liters of water a day as recommended by her doctor. Mary's glasses hold 250 mL of water. How many glasses of water should Mary drink per day to reach her goal?
train