ASVAB Arithmetic Reasoning Practice Test 426673 Results

Your Results Global Average
Questions 5 5
Correct 0 2.91
Score 0% 58%

Review

1

What is \( \frac{-6b^5}{1b^2} \)?

60% Answer Correctly
-6b10
-\(\frac{1}{6}\)b3
-6b3
-6b2\(\frac{1}{2}\)

Solution

To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:

\( \frac{-6b^5}{b^2} \)
\( \frac{-6}{1} \) b(5 - 2)
-6b3


2

If \( \left|b + 1\right| \) - 6 = 8, which of these is a possible value for b?

62% Answer Correctly
-15
8
-21
0

Solution

First, solve for \( \left|b + 1\right| \):

\( \left|b + 1\right| \) - 6 = 8
\( \left|b + 1\right| \) = 8 + 6
\( \left|b + 1\right| \) = 14

The value inside the absolute value brackets can be either positive or negative so (b + 1) must equal + 14 or -14 for \( \left|b + 1\right| \) to equal 14:

b + 1 = 14
b = 14 - 1
b = 13
b + 1 = -14
b = -14 - 1
b = -15

So, b = -15 or b = 13.


3

What is \( \frac{2}{8} \) ÷ \( \frac{1}{7} \)?

68% Answer Correctly
\(\frac{1}{5}\)
1\(\frac{3}{4}\)
\(\frac{1}{21}\)
\(\frac{8}{45}\)

Solution

To divide fractions, invert the second fraction and then multiply:

\( \frac{2}{8} \) ÷ \( \frac{1}{7} \) = \( \frac{2}{8} \) x \( \frac{7}{1} \)

To multiply fractions, multiply the numerators together and then multiply the denominators together:

\( \frac{2}{8} \) x \( \frac{7}{1} \) = \( \frac{2 x 7}{8 x 1} \) = \( \frac{14}{8} \) = 1\(\frac{3}{4}\)


4

\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?

55% Answer Correctly

commutative property for multiplication

distributive property for division

distributive property for multiplication

commutative property for division


Solution

The distributive property for division helps in solving expressions like \({b + c \over a}\). It specifies that the result of dividing a fraction with multiple terms in the numerator and one term in the denominator can be obtained by dividing each term individually and then totaling the results: \({b + c \over a} = {b \over a} + {c \over a}\). For example, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).


5

Which of the following statements about exponents is false?

46% Answer Correctly

b1 = b

b1 = 1

all of these are false

b0 = 1


Solution

A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).