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)

1 1 + 1 2 + 1 3

Sub 505 (Easy)

1 + 1 1 + 1 1 + 1 3 =

Sub 505 (Easy)

If 60 percent of a rectangular floor is covered by a rectangular rug that is 9 feet by 12 feet, what is the area, in square feet, of the floor?

555-605 (Medium)

38 69 22 73 31 47 13 82 Which of the following numbers is greater than three fourths of the numbers but less than one fourth of the numbers in the list above?

555-605 (Medium)

What is the sum of the integers in the table above?

Sub 505 (Easy)

If Mario was 32 years old 8 years ago, how old was he x years ago?

Sub 505 (Easy)

What is the ratio of 3/4 to the product 4(3/4)?

605-655 (Medium)

The population of a bacteria culture doubles every 2 minutes. Approximately how many minutes will it take for the population to grow from 1,000 to 500,000 bacteria?

505-555 (Easy)

The temperature in degrees Celsius (C) can be converted to temperature in degrees Fahrenheit (F) by the formula F = 9 5 * C + 32 . What is the temperature at which F = C?

Sub 505 (Easy)

(1 + 5 â) (1 â 5 â) = (1 + 5) (1 â 5) =

555-605 (Medium)

(â 1.5) (1.2) â (4.5) (0.4) 30

Sub 505 (Easy)

The value of -3-(-10) is how much greater than the value of -10-(-3) ?

505-555 (Easy)

Which of the following fractions is equal to the decimal 0.0625 ?

Sub 505 (Easy)

31 125 = 31 125 =

Sub 505 (Easy)

3 * 0.072 0.54 =

Sub 505 (Easy)

If k is an integer and 0.0010101*10^k is greater than 1,000, what is the least possible value of k ?

505-555 (Easy)

What is the value of 2 x 2 â 2.4 x â 1.7 for x = 0.7 ?

555-605 (Medium)

If the numbers 17/24, 1/2, 3/8, 3/4, and 9/16 were ordered from greatest to least, the middle number of the resulting sequence would be

Sub 505 (Easy)

In which of the following pairs are the two numbers reciprocals of each other? I. 3 and 1/3 II. 1/17 and -1/17 III. â 3 â and â 3 3 â 3

Sub 505 (Easy)

Of the following, the closest approximation to 5.98 (601.5) 15.79 â â â â â 5.98 (601.5) 15.79 is

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