ISEE Middle Level Math : Squares / Square Roots

Study concepts, example questions & explanations for ISEE Middle Level Math

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Example Questions

Example Question #1 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\dpi{100} (4+2)^{2}=\(\displaystyle \dpi{100} (4+2)^{2}=\)

Possible Answers:

\dpi{100} 36\(\displaystyle \dpi{100} 36\)

\dpi{100} 4\(\displaystyle \dpi{100} 4\)

\dpi{100} 16\(\displaystyle \dpi{100} 16\)

\dpi{100} 6\(\displaystyle \dpi{100} 6\)

Correct answer:

\dpi{100} 36\(\displaystyle \dpi{100} 36\)

Explanation:

Follow PEMDAS for order of operations.  First, we add the numbers inside the parentheses.

\dpi{100} 4+2=6\(\displaystyle \dpi{100} 4+2=6\)

Then we take \dpi{100} 6^{2}=36\(\displaystyle \dpi{100} 6^{2}=36\).

Example Question #1 : How To Find The Square Root

\(\displaystyle 13.25 < \sqrt{x} < 13.5\)

Which of the following is a possible value for \(\displaystyle x\)?

Possible Answers:

\(\displaystyle 185\)

\(\displaystyle 183\)

\(\displaystyle 175\)

\(\displaystyle 169\)

None of the other answers are correct.

Correct answer:

None of the other answers are correct.

Explanation:

\(\displaystyle 13.25 < \sqrt{x} < 13.5\)

We can find more information on the value of \(\displaystyle x\) by squaring all of our terms to remove the square root.

\(\displaystyle 13.25^{2} < \left (\sqrt{x} \right )^{2}< 13.5^{2}\)

\(\displaystyle 175.5625< x< 182.25\)

Now we have a range of values for \(\displaystyle x\), however, none of these choices fall in this range.

Example Question #1 : How To Find The Square Root

Evaluate: \(\displaystyle \sqrt{81} + \sqrt{25 } + \sqrt{36}\)

Possible Answers:

\(\displaystyle 16\)

\(\displaystyle 17\)

\(\displaystyle 18\)

\(\displaystyle 20\)

\(\displaystyle 22\)

Correct answer:

\(\displaystyle 20\)

Explanation:

Find the individual square roots and add them.

\(\displaystyle \sqrt{81} = 9\)

\(\displaystyle \sqrt{25 } = 5\)

\(\displaystyle \sqrt{36} = 6\)

\(\displaystyle \sqrt{81} + \sqrt{25 } + \sqrt{36} = 9 + 5 + 6 = 20\)

Example Question #1 : Isee Middle Level (Grades 7 8) Mathematics Achievement

What is the product of the square root of twice eighteen and four less than ten?

Possible Answers:

\(\displaystyle 6\)

\(\displaystyle 60\)

\(\displaystyle 54\)

\(\displaystyle 24\)

\(\displaystyle 36\)

Correct answer:

\(\displaystyle 36\)

Explanation:

\(\displaystyle \sqrt{2*18} *(10-4)\)

\(\displaystyle \sqrt{36} *6\)

\(\displaystyle 6*6=36\)

Example Question #2 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\(\displaystyle \frac{\sqrt{9}+\sqrt{25}} \sqrt{4}\)  =

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle 4\)

\(\displaystyle 8\)

\(\displaystyle 6\)

Correct answer:

\(\displaystyle 4\)

Explanation:

First find the square root for each number. Then solve accordingly.

\(\displaystyle \frac{3+5}{2}=\frac{8}{2}=4\)

The answer is 4.

Example Question #1 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\(\displaystyle \sqrt{25} + \sqrt{64} + \sqrt{16} =\)

Possible Answers:

\(\displaystyle 3\)

\(\displaystyle 25\)

\(\displaystyle 17\)

\(\displaystyle 13\)

Correct answer:

\(\displaystyle 17\)

Explanation:

First, find the square root of each number, then add.

\(\displaystyle 5 + 8 + 4=\)

\(\displaystyle 17\)

 

The answer is 17.

Example Question #1 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\(\displaystyle 3\sqrt{49} + \sqrt{144} =\)

Possible Answers:

\(\displaystyle 2\)

\(\displaystyle 22\)

\(\displaystyle 33\)

\(\displaystyle 252\)

\(\displaystyle 333\)

Correct answer:

\(\displaystyle 33\)

Explanation:

First, find the square roots of the numbers:

\(\displaystyle \sqrt{49} = 7\)

\(\displaystyle \sqrt{144}=12\)

Then, solve the equation using order of operations:

\(\displaystyle 3\left ( 7 \right ) + 12=\)

\(\displaystyle 21 + 12 = 33\)

The answer is \(\displaystyle 33\).

Example Question #8 : Squares / Square Roots

\(\displaystyle 4\left ( \sqrt{4} * \sqrt{9} \right )=\)

Possible Answers:

\(\displaystyle 20\)

\(\displaystyle 17\)

\(\displaystyle 24\)

\(\displaystyle 52\)

Correct answer:

\(\displaystyle 24\)

Explanation:

First, find the square root for each:

\(\displaystyle \sqrt{4}=2\)

\(\displaystyle \sqrt{9}=3\)

Then insert these into the equation and solve:

\(\displaystyle 4 \left ( 2*3 \right )=\)

\(\displaystyle 4*6=24\)

 

The answer is \(\displaystyle 24.\)

Example Question #5 : How To Find The Square Root

\(\displaystyle \frac{12\sqrt{121}}{\sqrt{16}}=\)

Possible Answers:

\(\displaystyle 12\)

\(\displaystyle 33\)

\(\displaystyle 42\)

\(\displaystyle 8\)

Correct answer:

\(\displaystyle 33\)

Explanation:

First, find the square root for each number:

\(\displaystyle \sqrt{121} = 11\)

\(\displaystyle \sqrt{16}=4\)

Then, insert these square roots into the equation and solve accordingly:

\(\displaystyle \frac{12\left ( 11 \right )}{4} =\)

\(\displaystyle \frac{132}{4}=33\)

The answer is 33.

 

Example Question #2 : Isee Middle Level (Grades 7 8) Mathematics Achievement

\(\displaystyle \sqrt{81}*\sqrt{25}*\sqrt{49}=\)

Possible Answers:

\(\displaystyle 21\)

\(\displaystyle 155\)

\(\displaystyle 52\)

\(\displaystyle 315\)

Correct answer:

\(\displaystyle 315\)

Explanation:

First, find the square root of each number:

\(\displaystyle \sqrt{81 } = 9\)

\(\displaystyle \sqrt{25}=5\)

\(\displaystyle \sqrt{49}=7\)

Solve the equation accordingly:

\(\displaystyle 9*5*7=315\)

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