Mathematics · Basic Arithmetic & Number Systems · page 7 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 (61–70)

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

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61.
Which one of the following is the smallest number by which $2880$ must be divided in order to make it a perfect square?
Correct Answer: B. $5$
One-liner
The smallest number by which $2880$ must be divided to get a perfect square is $5$.
62.
What is the square root of $5.29$?
Correct Answer: D. $2.3$
One-liner
The square root of $5.29$ is $2.3$.
63.
What is the value of $\sqrt{10} \times \sqrt{490}$?
Correct Answer: D. $70$
One-liner
The value of $\sqrt{10} \times \sqrt{490}$ is $70$.
64.
The square of $9$ is?
Correct Answer: A. $81$
One-liner
The square of $9$ is $81$ because $9 \times 9 = 81$.
65.
The square root of $1936$ is equal to?
Correct Answer: D. $44$
One-liner
The square root of $1936$ is $44$.
66.
If $a = 3$ and $b = 4$, then $\sqrt{a^2 + b^2} =$ _?
Correct Answer: D. $5$
One-liner
The value of $\sqrt{a^2 + b^2}$ when $a = 3$ and $b = 4$ is $5$.
67.
The square root of $144$ is?
Correct Answer: D. $12$
One-liner
The square root of $144$ is $12$, since $12 \times 12 = 144$.
68.
Square root of $1024$ is ?
Correct Answer: B. $32$
One-liner
The square root of $1024$ is $32$, since $32 \times 32 = 1024$.
69.
Past Paper MCQ
What is the nature of the expression $16 + \sqrt{16} + \sqrt[3]{27}$ ?
Correct Answer: A. Rational
One-liner
The expression $16 + \sqrt{16} + \sqrt[3]{27}$ simplifies to $16 + 4 + 3 = 23$, which is Rational.
70.
Past Paper MCQ
$\sqrt[3]{216} = ?$
Correct Answer: A. $6$
One-liner
The cube root of $216$ is $6$ because $6 \times 6 \times 6 = 216$.