##### ASVAB AFQT
Some questions on the Mathematics Knowledge subtest on the ASVAB are guaranteed to be totally radical. Not in the '80s sense, but because they deal with numbers that are square and cube roots of other numbers.

## Practice questions

1. Solve

when x = –3.

A. 152 B. 25 C. 1.5 D. 15

2. Given

simplify the expression.

1. The correct answer is Choice (D).

First evaluate the expression inside the square root symbol by filling in the value of x:

Find

by determining that

2. The correct answer is Choice (C).

you get

Factor and simplify, and look for perfect cubes to make it easier:

Rewrite the numbers and variables as the product of radicals so you continue to work with like terms:

Solve what you can and simplify:

Angie Papple Johnston joined the U.S. Army in 2006 as a Chemical, Biological, Radiological, and Nuclear specialist, ready to tackle chemical weapons in a Level- A HAZMAT suit. She's currently the CBRN noncommissioned officer-in-charge of an aviation battalion in Washington, D.C.