Mathematics · Algebra · page 13 of 15

Exponents and Powers MCQs with Answers

Includes 24 past paper MCQs (marked).

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Exponents and Powers MCQs (121–130)

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

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121.
The square of $a$ is _?
Correct Answer: A. $a^2$
One-liner
The square of $a$ is $a^2$.
122.
$i^{10}$ is equal to ?
Correct Answer: B. $-1$
One-liner
The value of $i^{10}$ is $-1$.
123.
Solve: $6.334 \times 10^4$
Correct Answer: A. $63340$
One-liner
Multiplying $6.334$ by $10^4$ shifts the decimal point four places to the right, giving $63340$.
124.
$10^0$ is equal to ?
Correct Answer: B. $1$
One-liner
Any non-zero number raised to the power of $0$ equals $1$.
125.
The geometric mean of $2$, $4$, and $8$ is?
Correct Answer: D. $4$
One-liner
The geometric mean of $2$, $4$, and $8$ is $4$.
126.
If a number is divided by its reciprocal, the result is _?
Correct Answer: C. Square of the number
One-liner
When a number is divided by its reciprocal, the result is the square of the number.
127.
The product of $3x^2$ and $4x^3$ is?
Correct Answer: D. $12x^5$
One-liner
The product is $12x^5$.
128.
Past Paper MCQ
If $x = 7 - 4\sqrt{3}$, find $x + \frac{1}{x}$.
Correct Answer: D. $14$
One-liner
The value of $x + \frac{1}{x}$ when $x = 7 - 4\sqrt{3}$ is $14$.
129.
Simplify: $\frac{2^{0.6} \times 4^{0.3} \times 8^{0.2}}{2^{1.8}} = ?$
Correct Answer: A. $1$
One-liner
The simplified value of the expression is $1$.
130.
If $y = \frac{2}{x}$, then $y + \frac{1}{2} \frac{d^2 y}{dx^2} = ?$
Correct Answer: A. $\frac{2(1 + x^2)}{x^3}$
One-liner
The value of $y + \frac{1}{2} \frac{d^2 y}{dx^2}$ is $\frac{2(1 + x^2)}{x^3}$.