If you buy 2 packs of 500 mL milk, it will cost $2.50. If you buy them individually, they will cost $1.30 each. How much is your total savings from buying ten sets of 2 packs of 500 mL milk?
Let's think: The price per 500 mL milk from the 2 packs is $2.50 / 2 = $1.25. This means that for each pack of 500 mL milk, you can save $1.30 - $1.25 = $0.05. Ten sets of 2 packs mean 10 x 2 = 20 packs of 500 mL of milk. So, your total savings will be $0.05 x 20 = $1.. The answer is: 1.

The city is holding its annual rubber duck race for charity. The regular size rubber ducks are $3.00 each and the large size rubber duck is $5.00 each. All of the rubber ducks will be dropped into the river at the same time and the first duck that floats across the finish line wins. They sold 221 regular size ducks and 185 large size ducks. How much money did the city raise for charity?
Let's think: They sold 221 regular size rubber ducks at $3.00 each so they made 221 * 3 = $663.00. They sold 185 large rubber ducks at $5.00 each so they made 185 * 5 = $925.00. The regular size ducks brought in $663.00 and the large brought in $925.00 for a total of 663 + 925 = $1,588.00 for charity.. The answer is: 1588.

Frank is making hamburgers and he wants to sell them to make $50. Frank is selling each hamburger for $5 and 2 people purchased 4 and another 2 customers purchased 2 hamburgers. How many more hamburgers does Frank need to sell to make $50?
Let's think: Frank sold 4 hamburgers and then sold 2 more, so all together Frank already sold 4 + 2 = 6 hamburgers. If each hamburger is $5 and he sold 6 hamburgers already, Frank has made 5 * 6 = 30 dollars. Frank wants to make $50 and has already made $30, so Frank still needs 50 - 30 = 20 dollars. Since he needs $20 and each hamburger is $5, Frank needs to sell 20 / 5 = 4 more hamburgers.. The answer is: 4.

The white rabbit can hop 15 meters in one minute. The brown rabbit hops 12 meters per minute. What is the total distance the two rabbits will hop in 5 minutes?
Let's think:
White rabbit + brown rabbit = 15 + 12 = 27. 5 minutes * 27 = 135 meters. The two rabbits will hop 135 meters in 5 minutes.. The answer is: 135.