## Roots and Radicals

A. 7

B. 13

C. 49

D. 91

E. 364

**Knowsys Method**

**Read the problem carefully.** Note that an integer is a whole number, not a fraction.

**Identify the bottom line.** Least potential value of x = ?

**Assess your options.** You could plug in each of the answer choices and find the smallest choice that results in an integer, but there is a much quicker way to solve this type of problem.

**Attack the problem.**

**Loop back. ** Did you solve for the bottom line? Yes.

The correct answer is D.

This is a medium-level problem.

**Want some help reviewing the math concepts you need to master? **Try out the Knowsys Pre-Algebra Flashcards, the Knowsys Algebra I Flashcards, and the Knowsys SAT & ACT Math Practice book.