Mathematics · Basic Arithmetic & Number Systems · page 5 of 8

Square Roots and Cube Roots MCQs with Answers

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Square Roots and Cube Roots MCQs (41–50)

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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41.
Find the value of $\sqrt{25} + \sqrt{4}$.
Correct Answer: C. $7$
One-liner
The value of $\sqrt{25} + \sqrt{4}$ is $7$.
42.
Which of the following is irrational?
Correct Answer: A. $\sqrt{11}$
One-liner
$\sqrt{11}$ is irrational because 11 is not a perfect square, so its square root is a non-terminating, non-repeating decimal.
43.
Evaluate $\sqrt[3]{32768}$.
Correct Answer: C. $32$
One-liner
The cube root of $32768$ is $32$, since $32^3 = 32768$.
44.
The multiplicative inverse of $\sqrt{5}$ is?
Correct Answer: D. $\frac{1}{\sqrt{5}}$
One-liner
The multiplicative inverse of $\sqrt{5}$ is $\frac{1}{\sqrt{5}}$.
45.
What is the length of each side of a square whose area is $576 \text{ cm}^2$?
Correct Answer: A. $24 \text{ cm}$
One-liner
The side length of a square with area $576 \text{ cm}^2$ is $24 \text{ cm}$.
46.
Cube root of 343 is?
Correct Answer: A. $7$
One-liner
The cube root of $343$ is $7$ because $7 \times 7 \times 7 = 343$.
47.
The difference between the first two perfect squares that end with 6 is?
Correct Answer: C. $20$
One-liner
The difference between the first two perfect squares ending with 6 is $20$.
48.
What number, when multiplied by itself, gives 5 more than 20?
Correct Answer: C. $5$
One-liner
The number is $5$, because $5 \times 5 = 25$, which is $5$ more than $20$.
49.
The value of $\sqrt[3]{27}$ is equal to ?
Correct Answer: D. $3$
One-liner
The cube root of $27$ is $3$ because $3 \times 3 \times 3 = 27$.
50.
What number when multiplied by itself gives 5 more than 20?
Correct Answer: C. $5$
One-liner
The number is $5$, because $5 \times 5 = 25$ and $20 + 5 = 25$.

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Square Roots and Cube Roots MCQs with Answers

Square Roots and Cube Roots MCQs (41–50)

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