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 sum 7 8 + 1 9 is between

Sub 505 (Easy)

1 0.75 â 1 =

Sub 505 (Easy)

1 2 + 2 3 * 3 8 4 â 9 16 .

Sub 505 (Easy)

0.1 + 0.1 2 + 0.1 3 =

Sub 505 (Easy)

A certain country had a total annual expenditure of $1.2 x 10^12 last year. If the population of the country was 240 million last year, what was the per capita expenditure?

Sub 505 (Easy)

When 1/10 percent of 5,000 is subtracted from 1/10 of 5,000, the difference is

Sub 505 (Easy)

Last year, for every 100 million vehicles that traveled on a certain highway, 96 vehicles were involved in accidents. If 3 billion vehicles traveled on the highway last year, how many of those vehicles were involved in accidents?

Sub 505 (Easy)

If x = -1, then (x^4 - x^3 + x^2)/(x - 1) =

Sub 505 (Easy)

If 1 kilometer is approximately 0.6 mile, which of the following best approximates the number of kilometers in 2 miles?

Sub 505 (Easy)

There are 4 more women than men on Centervilleâs board of education. If there are 10 members on the board, how many are women?

Sub 505 (Easy)

A rope 40 feet long is cut into two pieces. If one piece is 18 feet longer than the other, what is the length, in feet, of the shorter piece?

555-605 (Medium)

In an increasing sequence of 10 consecutive integers, the sum of the first 5 integers is 560. What is the sum of the last 5 integers in the sequence?

505-555 (Easy)

â 16 * 20 + 8 * 32 = 16 * 20 + 8 * 32 â â â â â â â =

Sub 505 (Easy)

The average (arithmetic mean) of 10, 30, and 50 is 5 more than the average of 20, 40, and

Sub 505 (Easy)

For which of the following values of n is (100+n)/n NOT an integer?

605-655 (Medium)

A rainstorm increased the amount of water stored in State J reservoirs from 124 billion gallons to 138 billion gallons. If the storm increased the amount of water in the reservoirs to 82 percent of total capacity, approximately how many billion gallons of water were the reservoirs short of total capacity prior to the storm?

Sub 505 (Easy)

If 2 1 + 2 y = 1 , then y =

Sub 505 (Easy)

1 â (1 2 â 2 3) =

Sub 505 (Easy)

Of the following, which is the closest approximation of 50.2*0.49/199.8

Sub 505 (Easy)

A studentâs average (arithmetic mean) test score on 4 tests is 80. What must be the studentâs score on a 5th test for the studentâs average score on the 5 tests to be 82?

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