2019 SAT Prep

A number is increased by 25% and then decreased by 20%. The result is what percent of the original number?

• 80

• 100

• 105

• 120

A business paid $300 to rent a piece of office equipment for one year. The rent was then increased by 10% each year thereafter. How much will the company pay for the first three years it rents the equipment?

• $920

• $960

• $990

• $993

Becca deposits $100 into a bank account that earns an annual interest rate of 4%. If she does not make an additional deposits and makes no withdrawals, how long will it take her, in years, to increase the value of her account by at least 60%?

• 12

• 15

• 25

• 30

Maria has taken four chemistry tests and has an average (arithmetic mean) score of 80. If she scores a 90 on her fifth chemistry test, what is her average for these five tests?

• 80

• 81

• 82

• 84

The average (arithmetic mean) of a list of 5 numbers is n. When an additional number is added to the list, the average of all 6 numbers is n + 3. Which of the following is the value, of the number added to the list?

• 6n + 18

• 5n

• n + 18

• n + 6

Brian plans to complete a 100 mile bike race for charity. According to his registration materials, he will need to ride at an average speed of 12.5 miles per hour if he ants to complete the course before it closes. On a practice ride the week before the race, Brian rides 60 miles and tracks his speed. For the first 30 miles, his average speed is 16 miles per hours, and for the next 30 miles, his average speed is 15 miles per hour. If Brian can match these speed for the first 60 miles of the charity race, then he rests for a total of 1 hour after that, what approximate speed must he maintain for the last 40 miles in order to complete the ride on time?

• 8 miles per hour

• 10 miles per hour

• 13 miles per hour

• 14 miles per hour

A bag contains 7 blue marbles and 14 marbles that are not blue. If one marble is drawn at random from the bag, what is the probability that the marble is blue?

• 1/3

• 1/2

• 2/3

• 3/7

The amount of time that Amy walks is directly proportional to the distance that she walks. if she walks a distance of 2.5 miles in 50 minutes, how many miles will she walk in 2 hours?

• 4.5

• 5

• 6

• 6.5

A total of 140,000 votes were cast for two candidates, Skinner and Whitehouse. If Skinner won by a ratio of 4 to 3, how many votes were cast for Whitehouse?

• 30,000

• 40,000

• 60,000

• 80,000

Of all the houses in a certain neighborhood, 80% have garages. Of those houses with garages, 60% have two car garages. If there are 56 houses with garages that are not two car garages, how many houses are there in the neighborhood?

• 93

• 117

• 156

• 175