Arithmetic

Arithmetic looks like the easy part of GMAT Quant, which is exactly why it is dangerous: the test writers hide difficulty in fractions, percents, ratios, and remainders rather than in advanced math. These Problem Solving questions drill the number sense the rest of Quant is built on — decimal and fraction manipulation, percent change, ratio splits, and divisibility. If your accuracy here is below 90%, fix that before touching harder topics; arithmetic errors are the most common source of lost points on questions you knew how to solve.

Divisibility, remainders, factors, multiples.·Show:20 30 50

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Sub 505 (Easy)

The value of 7 8 + 1 9 1 2 is closest to which of the following?

505-555 (Easy)

Which of the following is greatest?

Sub 505 (Easy)

(1/2) â 3 (1/4) â 2 (1/16) â 1 = (1/2) â 3 (1/4) â 2 (1/16) â 1 =

Sub 505 (Easy)

If the average (arithmetic mean) of the four numbers 3, 15, 32, and (N + 1) is 18, then N =

605-655 (Medium)

The table shows the amount budgeted and the amount spent for each of three accounts in a certain company.For which of these accounts did the amount spent differ from the amount budgeted by more than 6 percent of the amount budgeted ?

Sub 505 (Easy)

A certain restaurant that regularly advertises through the mail has 1,040 cover letters and 3,000 coupons in stock. In its next mailing, each envelope will contain 1 cover letter and 2 coupons. If all of the cover letters in stock are used, how many coupons will remain in stock after this mailing?

505-555 (Easy)

If k is an integer and (.0025)(.025)(.00025)10^k is an integer, what is the least possible value of K?

555-605 (Medium)

One inch represents 20 miles on Map K and one inch represents 30 miles on Map L. An area of 3 square inches represents how many more square miles on Map L than on Map K ?

Sub 505 (Easy)

The table shows a summary of the ticket sales from four performances of a certain play. What is the difference between the maximum and the minimum ticket-sale revenue from a single performance?

555-605 (Medium)

The average distance between the Sun and a certain planet is approximately 2.3 x 10^14 inches. Which of the following is closest to the average distance between the Sun and the planet, in kilometers?

Sub 505 (Easy)

Which of the following is closest to â 4.2 (1 , 590) 15.7 â â â â â ?

705-805 (Hard)

The product of all the prime numbers less than 20 is closest to which of the following powers of 10 ?

555-605 (Medium)

Last month a certain music club offered a discount to preferred customers. After the first compact disc purchased, preferred customers paid

3.99 f or e a c ha dd i t i o na l co m p a c t d i sc p u r c ha se d . I f a p r e f er r e d c u s t o m er p u r c ha se d a t o t a l o f 6 co m p a c t d i scs an d p ai d

15.95 for the first compact disc, then the dollar amount that the customer paid for the 6 compact discs is equivalent to which of the following?

Sub 505 (Easy)

4.8 * 10 9 â â â â â 4.8 * 10 9 is closest in value to

Sub 505 (Easy)

If 893 Ã 78 = p, which of the following is equal to 893 Ã 79?

655-705 (Hard)

What is the tenths digit of the quotient when thirty-five hundredths is divided by four thousandths?

Sub 505 (Easy)

1 3 + 1 2 â 5 6 + 1 5 + 1 4 â 9 20 = 1 3 + 1 2 â 5 6 + 1 5 + 1 4 â 9 20 =

505-555 (Easy)

At a certain instant in time, the number of cars, N, traveling on a portion of a certain highway can be estimated by the formula N = 20 L d 600 + s 2 where L is the number of lanes in the same direction, d is the length of the portion of the highway, in feet, and s is the average speed of the cars, in miles per hour. Based on the formula, what is the estimated number of cars traveling on a 1/2-mile portion of the highway if the highway has 2 lanes in the same direction and the average speed of the cars is 40 miles per hour?

Sub 505 (Easy)

1 + 1 3 â 1 + 1 2

555-605 (Medium)

(0.0036) (2.8) (0.04) (0.1) (0.003) =

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