TEST ANSWERS:
A. There are three different sized packages of lunch bags. The 25-bag package is $1.50. The 75-bag package is $3.00. The 125- bag package is $3.75. What is the unit price of each? Which box is the best buy?
ANSWER: The unit price of each package is:
- $1.50/25 = $.06 per bag
- $3.00/75 = $.04 per bag
- $3.75/125 = $.03 per bag
The best buy is the 125-bag package. Each bag costs 3 cents.
2. ANSWER: B. $69.72 . Gas is sold by 9/10th of gallon. When you see the price advertised at $2.49⁹, you have to be able to figure the cost; to do this you need to multiply the gallons of gas you pumped by the cost per 9/10 gallon of gas: $2.499 x 28 gallons = $69.972, there is no cash discount because you are paying with a credit card.
3. ANSWER: D. $38.50. Gas is sold by 9/10th of gallon. When you see the price advertised at $2.19⁹, you have to be able to figure the cost; to do this you need to multiply the gallons of gas you pumped by the cost per 9/10 gallon of gas and subtract the discount for paying with cash: $2.199 x 18 gallons = $39.582 less cash discount $1.08 ( $0.06 x 18 gallons = $1.08) = $38.50 .
1. You need to buy 3 yards of rope. The hardware store sells the rope for $2.50 per yard. What is the cost?
ANSWER: $ 7.50 (3 yards X $ 2.50 = $ 7.50)
2. You go to the supermarket to buy dog food. The 10-pound bag costs $6.90. The 4-pound bag is marked $4.40. Which is the better buy?
ANSWER: The 10-pound bag which costs 69 cents per pound.
($6.90/10 = $ .69 per pound; $4.40/4 -- $1.10 per pound)
3. You buy 15 gallons of gasoline at $1.39 per gallon. There is a 4 cent per gallon cash discount. What should you pay if you use a credit card? What should you pay if you use cash?
ANSWER: If you use a credit card, you should pay $20.85 (15 gallons X $1.39 -- $20.85)
If you use cash, you should pay $20.25
(15 gallons X $.04 -- $.60 discount) ($20.85 - $.60 = $20.25)
4. You have 350 gallons of heating oil delivered to your home. What should you look for on the delivery ticket?
ANSWER: The seller's name and address; your name and address; the delivery date; the amount sold (350 gallons); the type of fuel (home heating oil); the unit price.