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Answers and Complete Explanations for Practice Test 2
Section II: Mathematics
1. B. “What number is 15% of 80” can be changed into an equation:
N=
. 15#
80
N=
12
2. C. The number 6 is divisible by 1, 2, 3, and 6. The number 8 is divisible by 1, 2, 4, and 8.
And the number 12 is divisible by 1, 2, 3, 4, 6, and 12. So the common factors are 1 and 2
only.
3. A. ( 7+ 8 )'
2
⁄3
15 ' 2 ⁄3
15 # 3 ⁄2 = 45 ⁄2 =22 1 ⁄2
4. E. Simply add the tons shipped for each company, 5+ 7+ 9+ 12=
33.
But remember the answer must be expressed in millions: 33,000,000.
5. B. Only choice B, 31 ⁄60, is greater than 1 ⁄2. All the other choices are less than 1 ⁄2.
6. D. Set up the ratio:
7
=
9
$ 168 . x
7x
= $ 1512 .
x=
$ 216 .
Or simply divide 7 into $1.68 and multiply the result by 9.
7. D. There are 3 chances out of 4 of spinning either red, yellow, or blue. Thus, the correct
answer is 3 ⁄4 .
8. D. 4 rods = (4) (16 1 ⁄2 feet) = 66 feet
66 feet × 12 = 792
9. C. The easiest way to do this problem is to round $47.93 to $48 and then multiply by
15%.
48
# .15
240
48
720 . (count off two spaces to place the decimal)
So rounded to the nearest dollar is $7.00.
10. C. Figure ABCD is a parallelogram. The formula for the area of a parallelogram is
area = base times height. Since the base is 6 and the height (a perpendicular drawn to the
base) is 3, the area would be computed by 6# 3, or answer C.
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