Mystery #1
Denise measured the length of her yard to be 90 feet. The actual length is 86 feet. What is the approximate percent of error in her measurement?
What is 4.65%?
The original price of a DVD was $12. The price was reduced by 18%. What is the new price of the DVD?
What is $9.84?
Jamal’s lunch costs $8.95, plus 6.5% sales tax. What is the total cost of Jamal’s lunch, including sales tax?
What is $9.53?
A $48 aquarium is on sale at a discount of 24%. What is the sale price of the aquarium?
What is $36.48?
Mr. Sanchez earned a salary of $49,375 last year. He expects to earn 11% more this year. Which is closest to the salary Mr. Sanchez expects to earn this year?
What is $54,806.25?
A pipe leaks 50 gallons in 8 minutes. At this rate, how many minutes will the pipe take to leak 75 gallons?
What is 12 minutes?
Over the past few years, Michael has increased his fee for mowing lawns from $5.00 per hour to $11.00 per hour. What percent did Michael’s fee increase?
What is 120%?
Tim has completed 5 math problems in 13 minutes. If he continues at the same rate, how long will it take him to finish his 20-problem assignment?
What is 52 minutes?
A computer desk that cost the store $44.00 is selling for $88.00. What is the percentage markup on the price of the computer desk?
What is 100%?
Schalean paid $216.14, tax included, for a stereo system. If he paid $17.39 in sales tax, what percent sales tax did Schalean pay?
What is 8.75%?
An umbrella that costs $6.00 to manufacture is sold for $11.70. What is the percent increase in price?
What is 95%?
Ms. Franco bought $20 calculators for her math class at a discount of 15% on each calculator. How much did she spend for 30 calculators?
What is $510?
A computer store ordered 880 software packages. If the computer store ordered 1000 software packages last month, what was the percent of decrease in the store’s order?
What is 12%?
Beth earns a commission of 3% when she sells a new computer. A new computer costs $1,895.00. If she sells 4 new computers, how much is her commission on those 4 sales?
What is $227.40?
Mr. Sanchez bought 2 magazines for $9.95 each and 1 book for $14.95. If the sales tax is 6%, what is the total cost of Mr. Sanchez’s purchases?
What is $36.94?
Baseball cards cost $3.79 a pack. There is a 25% discount if 10 or more packs are purchased. Sales tax is 7%. If Terry bought 15 packs of cards, about how much did he pay?
What is $45.62?
At the book fair, books were on sale for 15% off the regular price. Kiesha bought 3 books that each had a regular price of $6.00. What is the total amount, before tax, that she saved by buying these books on sale?
What is $2.70?
The ratio of boys to girls in Mr. Wallace’s class is 5 to 8. Which class has the same ratio of boys to girls as Mr. Wallace’s class?
A. a class of 40 students where 25 students are boys
B. a class of 39 students with 9 more girls than boys
C. a class of 35 students where 40% are boys
D. a class of 16 boys and 10 girls
What is B?
Mr. Tucker earns $250 per week working in an appliance store. In addition, he earns 2% commission on all of his sales. Last week, he sold $2,800 worth of appliances. What was Mr. Tucker’s total income for the week?
What is $306?
All swimsuits at a clothing store were marked down 30% on July 10. On August 1, all remaining swimsuits were marked down an additional 20%. If a swimsuit was originally $17.95, how much does it cost after August 1?
What is $10.05?
On January 1 of last year, a company had 140 employees. The company increased its number of employees by 15% during the year. If the company adds 10 more employees this year, what will be the approximate percent increase in the number of employees since January 1 of last year?
What is 22.14%
Two sporting goods stores are having discount sales on basketballs.
At one store, a basketball is on sale for 20% off the regular price of $24.95.
At the other store, the same kind of basketball is on sale for 25% off the regular price of $25.80.
What is the difference between the sale prices of the two stores?
What is $0.61?
A store bought some shirts from a supplier. The store paid $20 for each shirt. It set the regular price of each shirt at 50% more than what it paid. Then the store had a sale. Each shirt was on sale for 50% off the regular price. A customer purchased a shirt on sale. How much money did the customer pay for the shirt?
What is $15?
If a snail can crawl 2/3 yard in 1/5 hour, how many yards can the snail crawl in 1 hour?
What is 3 and 1/3 yards?
Juanita bought one CD for $7.99 and one DVD for $8.99. The sales tax on these items was 7%. She also bought lunch for $4.25, including tax. If Juanita started with $40, how much does she now have?
What is $17.58?