Bryan bought three different bottles of milk. The bottles contain the following volumes of milk: 2 liters, 750 milliliters, 250 milliliters. How many liters of milk did Bryan buy in total?
Let's think: Bryan bought a total of 750 + 250 = 1000 milliliters of milk from the two smaller bottles. Since 1 liter is equal to 1000 milliliters, then 1000 milliliters is equal to 1000 / 1000 = 1 liter. Therefore, Bryan bought a total of 2 + 1 = 3 liters of milk.. The answer is: 3.

The ratio of boys to girls in a classroom is 3:5. If there are 4 more girls than boys, how many students are in the classroom?
Let's think: Since the ratio of boys to girls is 3:5, then the class is divided into 3 + 5 = 8 parts. The girls have 5 - 3 = 2 parts more than the boys. Since 2 parts are equal to 4, then 1 part is equal to 4 / 2 = 2 students. Hence, there are 8 parts x 2 = 16 students.. The answer is: 16.

Nate is reading a 400-page book. He finished reading 20% of the book. How many pages does he need to read to finish the book?
Let's think: Nate had read 400 x 20 / 100 = 80 pages. So, he still needs to read 400 - 80 = 320 pages to finish the book.. The answer is: 320.

Emily wants to know how much it rained last week. She sees that it rained 2 inches on Monday morning and 1 more inch later that day. It rained twice that much on Tuesday. It did not rain on Wednesday but on Thursday it rained 1 inch. The biggest storm was on Friday when the total was equal to Monday through Thursday combined. What was the daily average rain total for the week?
Let's think:
The total rain was 2 inches + 1 inches = 3 inches on Monday. The total rain was 2 * 3 inches = 6 inches on Tuesday. The total rain was 0 inches + 1 inch = 1 inch across Wednesday and Thursday. The total rain was 3 inches + 6 inches + 1 inch = 10 inches on Friday. There were 3 inches + 6 inches + 1 inch + 10 inches = 20 inches total last week. 20 inches / 5 days = 4 inches average daily rain.. The answer is: 4.