Mathematics · Basic Arithmetic & Number Systems · page 2 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 (11–20)

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

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11.
Find the least square number which is divisible by 10, 12, 15 and 18.
Correct Answer: A. $900$
One-liner
The least square number divisible by 10, 12, 15, and 18 is $900$.
12.
Past Paper MCQ
Find the square root of 6492304:
Correct Answer: A. $2548$
One-liner
The square root of $6492304$ is $2548$.
13.
The volume of a cubic room is $2744 \, \text{m}^3$. Find the length of the room.
Correct Answer: B. $14 \, \text{m}$
One-liner
The length of the room is $14 \, \text{m}$ because $\sqrt[3]{2744} = 14$.
14.
Find the value of $\sqrt{0.0025}$.
Correct Answer: A. $0.05$
One-liner
The value of $\sqrt{0.0025}$ is $0.05$.
15.
The square root of $\frac{1}{4}$ is?
Correct Answer: A. $\frac{1}{2}$
One-liner
The square root of $\frac{1}{4}$ is $\frac{1}{2}$.
16.
A perfect square that lies between 40 and 50 is _?
Correct Answer: C. $49$
One-liner
The perfect square between 40 and 50 is $49$ (since $7^2 = 49$).
17.
What is the value of $\sqrt[3]{9}$?
Correct Answer: C. $\sqrt[3]{9}$
One-liner
The value of $\sqrt[3]{9}$ is $\sqrt[3]{9}$ (it is an irrational number and cannot be simplified to an integer).
18.
If $x^3 = 27$, then $x$ is equal to ?
Correct Answer: A. $3$
One-liner
The value of $x$ is $3$ because $3^3 = 27$.
19.
What is the value of $4\sqrt{144} + 3\sqrt{25}$?
Correct Answer: C. $63$
One-liner
The value of $4\sqrt{144} + 3\sqrt{25}$ is $63$.
20.
Solve: $\sqrt{1.44}$
Correct Answer: A. $1.2$
One-liner
The square root of $1.44$ is $1.2$.