ASVAB Arithmetic Reasoning Practice Test 722253 Results

Your Results Global Average
Questions 5 5
Correct 0 2.73
Score 0% 55%

Review

1

If \(\left|a\right| = 7\), which of the following best describes a?

67% Answer Correctly

none of these is correct

a = 7

a = 7 or a = -7

a = -7


Solution

The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).


2

What is \( 2 \)\( \sqrt{50} \) + \( 5 \)\( \sqrt{2} \)

35% Answer Correctly
15\( \sqrt{2} \)
10\( \sqrt{2} \)
7\( \sqrt{100} \)
10\( \sqrt{100} \)

Solution

To add these radicals together their radicands must be the same:

2\( \sqrt{50} \) + 5\( \sqrt{2} \)
2\( \sqrt{25 \times 2} \) + 5\( \sqrt{2} \)
2\( \sqrt{5^2 \times 2} \) + 5\( \sqrt{2} \)
(2)(5)\( \sqrt{2} \) + 5\( \sqrt{2} \)
10\( \sqrt{2} \) + 5\( \sqrt{2} \)

Now that the radicands are identical, you can add them together:

10\( \sqrt{2} \) + 5\( \sqrt{2} \)
(10 + 5)\( \sqrt{2} \)
15\( \sqrt{2} \)


3

Which of the following statements about exponents is false?

47% Answer Correctly

b0 = 1

b1 = b

all of these are false

b1 = 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).


4

a(b + c) = ab + ac defines which of the following?

74% Answer Correctly

commutative property for division

distributive property for multiplication

distributive property for division

commutative property for multiplication


Solution

The distributive property for multiplication helps in solving expressions like a(b + c). It specifies that the result of multiplying one number by the sum or difference of two numbers can be obtained by multiplying each number individually and then totaling the results: a(b + c) = ab + ac. For example, 4(10-5) = (4 x 10) - (4 x 5) = 40 - 20 = 20.


5

A circular logo is enlarged to fit the lid of a jar. The new diameter is 50% larger than the original. By what percentage has the area of the logo increased?

50% Answer Correctly
25%
17\(\frac{1}{2}\)%
22\(\frac{1}{2}\)%
15%

Solution

The area of a circle is given by the formula A = πr2 where r is the radius of the circle. The radius of a circle is its diameter divided by two so A = π(\( \frac{d}{2} \))2. If the diameter of the logo increases by 50% the radius (and, consequently, the total area) increases by \( \frac{50\text{%}}{2} \) = 25%