Mathematics · Basic Arithmetic & Number Systems · page 3 of 8

Square Roots and Cube Roots MCQs with Answers

Includes 8 past paper MCQs (marked).

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Square Roots and Cube Roots MCQs (21–30)

10 MCQs with answers and a short one-liner. Hide answers to test yourself.

Past paper MCQs in this chapter · See all past papers

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21.
If $h^3 = 64$, then the value of $h$ is:
Correct Answer: A. $4$
One-liner
The value of $h$ is $4$, since $4^3 = 64$.
22.
What is the value of $\sqrt{\frac{25}{36}}$?
Correct Answer: D. $\frac{5}{6}$
One-liner
The value of $\sqrt{\frac{25}{36}}$ is $\frac{5}{6}$.
23.
Past Paper MCQ
If $A = \sqrt{5} + 1 + \sqrt{5} - 1$ and $B = \sqrt{5} - 1 + \sqrt{5} + 1$, then $A + B$ is equal to:
Correct Answer: A. $4\sqrt{5}$
One-liner
Simplifying $A$ and $B$ gives $A = 2\sqrt{5}$ and $B = 2\sqrt{5}$, so $A + B =$ $4\sqrt{5}$.
24.
In $\sqrt[n]{a}$, $a$ is called the ?
Correct Answer: C. Radicand
One-liner
In $\sqrt[n]{a}$, the quantity $a$ under the radical sign is called the radicand.
25.
What number, when multiplied by itself, gives $6$ more than $30$?
Correct Answer: D. $6$
One-liner
The number is $6$, because $6 \times 6 = 36$, which is $6$ more than $30$.
26.
The area of a square is given by the formula $A = s^2$. If the area of a square is $169 \text{ in}^2$, what is the length, in inches, of each side of this square?
Correct Answer: C. $13$ inches
One-liner
The side length is found by taking the square root of the area, so $s = \sqrt{169} =$ $13$ inches.
27.
Which of the following is not a perfect cube?
Correct Answer: C. $6125$
One-liner
$6125$ is not a perfect cube because it equals $5^3 \times 7^2$, and the exponent of $7$ is not a multiple of $3$.
28.
There are 625 plants arranged in as many rows as there are plants in each row. The number of plants in each row would be ?
Correct Answer: B. $25$
One-liner
The number of plants in each row is $25$, since $25 \times 25 = 625$.
29.
The cube root of $1000$ is?
Correct Answer: A. $10$
One-liner
The cube root of $1000$ is $10$, because $10 \times 10 \times 10 = 1000$.
30.
The geometric mean between $4$ and $16$ is:
Correct Answer: B. $8$
One-liner
The geometric mean between $4$ and $16$ is $8$.

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Square Roots and Cube Roots MCQs with Answers

Square Roots and Cube Roots MCQs (21–30)

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