Algebra Exponents and Roots Practice Test Results

Question 1
57% answer correctly
What`s the square root of \\(16x^2\\) ?
4x
\\(\\sqrt{4}x\\)
\\(4\\sqrt{x}\\)
\\(\\sqrt{4x}\\)
Question 2
57% answer correctly
What is the root in \\(\\sqrt[3]{64}\\) ?
\\(\\sqrt{ }\\)
4
64
3
Question 3
58% answer correctly
Simplify \\(\\sqrt{20}\\)
\\(2\\sqrt{20}\\)
\\(5\\sqrt{20}\\)
\\(2\\sqrt{5}\\)
\\(5\\sqrt{2}\\)