Q: A patient is receiving treatment through a saline drip which makes 20 drops per minute. If the treatment lasts 2 hours, and every 100 drops equal 5 ml of liquid, how many milliliters of treatment will the patient receive after the 2 hours have passed?
A: The total of minutes the treatment will take is 2 hours x 60 minutes / hour = 120 minutes. After 120 minutes has passed the total amount of drops that the patient will receive is 20 drops / minute x 120 minutes = 2400 drops. Knowing the number of drops, we know that the patient has taken 2400 drops x 5 ml / 100 drops = 120 ml. The answer is 120.

Q: At the duck park, there are 25 mallard ducks and ten less than twice as many geese as ducks. Then, a small flock of 4 ducks arrived at the park and joined the birds already there. If five less than 15 geese leave the park, how many more geese than ducks remain at the park?
A: Initially, twice as many geese as ducks is 25 * 2 = 50 geese. Therefore, ten less than twice as many geese as ducks is 50 - 10 = 40 geese. Then, 4 ducks arrived at the park, resulting in 25 + 4 = 29 ducks. Five less than 15 geese is 15 - 5 = 10 geese. Thus, if 5 less than 15 geese leave, then 40 - 10 = 30 geese remain. Thus, there are 30 - 29 = 1 more geese than ducks remaining at the park. The answer is 1.

Q: A salesman bought a case of 48 backpacks for $576. He sold 17 of them for $18 at the swap meet, 10 were sold to a department store for $25 each. If the remainder were sold for $22 each. How much was the salesman's profit?
A:
The salesman sold 17 bags for 17 bags x $18 / bag = $306. He sold 10 more for 10 bags x $25 / bag = $250. Thus far he has sold 17 bags + 10 bags = 27 bags. Therefore he sold 48 bags - 27 bags = 21 bags for $22 each. 21 bags were sold for 21 bags x $22 / bag = $462. In total the salesman made $306 + $250 + $462 = $1018. The salesman made $1018 - $576 = $442 in profit. The answer is 442.