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\begin{aligned} \sqrt{\frac{0.081 * 0.484 }{0.0064 * 6.25}} \end{aligned}

  • 0.66
  • 0.77
  • 0.88
  • 0.99

Answer: Option D

Similar Questions :

1. \begin{aligned}
(\frac{\sqrt{625}}{11} \times \frac{14}{\sqrt{25}} \times \frac{11}{\sqrt{196}})
\end{aligned}

  • 15
  • 7
  • 5
  • 9

Answer: Option C

Explanation:

\begin{aligned}
= (\frac{25}{11} \times \frac{14}{5} \times \frac{11}{14})
\end{aligned}

\begin{aligned}
= 5
\end{aligned}

2. Evaluate
\begin{aligned}
\sqrt{0.00059049}
\end{aligned}

  • 0.00243
  • 0.0243
  • 0.243
  • 2.43

Answer: Option B

Explanation:

Very obvious tip here is, after squre root the terms after decimal will be half (that is just a trick), works awesome at many questions like this.

3. Evaluate \begin{aligned} \sqrt[3]{\sqrt{.000064}} \end{aligned}

  • 0.0002
  • 0.002
  • 0.02
  • 0.2

Answer: Option D

Explanation:

\begin{aligned} = \sqrt{.000064} \end{aligned}
\begin{aligned} = \sqrt{\frac{64}{10^6}} \end{aligned}
\begin{aligned} = \frac{8}{10^3} = .008 \end{aligned}
\begin{aligned} = \sqrt[3]{.008} \end{aligned}
\begin{aligned} = \sqrt[3]{\frac{8}{1000}} \end{aligned}
\begin{aligned} = \frac{2}{10} = 0.2 \end{aligned}

4. The least perfect square, which is divisible by each of 21, 36 and 66 is

  • 213414
  • 213424
  • 213434
  • 213444

Answer: Option D

Explanation:

L.C.M. of 21, 36, 66 = 2772

Now, 2772 = 2 x 2 x 3 x 3 x 7 x 11

To make it a perfect square, it must be multiplied by 7 x 11.

So, required number = 2 x 2 x 3 x 3 x 7 x 7 x 11 x 11 = 213444

5. What is the square root of 0.16

  • 0.4
  • 0.04
  • 0.004
  • 4

Answer: Option A

Explanation:

as .4 * .4 = 0.16

Read more from - Square Root and Cube Root Questions Answers