epdf.pub_cbest-cliffs-test-prep13a9b242c7cb4125e6cca92d00a73d5a41681

The Mathematics Section
First underline or circle “approximately how many people” and “other shifts.”
Remember, you’re looking for “other shifts.” Notice that the answers are spread out.
Now, approximate 21% as 20%. Next, approximate 2,100 people as 2,000 people.
So, 20% of 2,000 is .20 × 2,000 = 400.
But be careful; 400 is the number of those who work only the night shift, and you
want the number of people who work the other shifts. So subtract 400 from 2,000,
leaving 1,600. The correct answer is D.
Another method is to approximate, then subtract 20% from 100%, to get 80%,
which is the percent of other workers. Multiply 80% times 2,000 and you get 1,600.
Simplify the Problem
Sometimes combining terms, performing simple operations, or simplifying the
problem in some other way gives you insight and makes the problem easier to
solve.
Samples
26. Which of the following is between 1 ⁄4 and 0.375?
A. 0.0094
B. 0.291
C. 0.38
D. 0.4
E. 0.51
First underline the word “between.” Next, simplify 1 ⁄4 to .25. A quick glance at the
choices is valuable because it tips you off that you are working in decimals.
Simply check which decimal is between .250 and .375. The correct answer is B —
.291 is between .250 and .375. Notice that changing .25 to .250 makes the problem
even easier. (Adding or eliminating zeros to the far right of a decimal doesn’t
change the value of the number.)
27. Which of the following is equal to 1 ⁄5 of 0.02 percent?
A. 0.4
B. 0.04
C. 0.004
D. 0.0004
E. 0.00004
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