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CTET Paper II (Mathematics and Science) 29 Dec 2021 Solved Paper

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Question : 34 of 150

Marks: +1, -0

\sqrt{0.004096}

is equal to

0.016
0.064
0.64
0.16

Solution:

Concept:

Square root of a decimal can be found by expressing it as a product of a perfect square and a power of 10.

Explanation:

Write

0.004096

as

4096 \times 10^{-6}

.

Square root of

4096

is

64

because

64^2 = 4096

.

Square root of

10^{-6}

is

10^{-3} = 0.001

.

Multiply:

64 \times 0.001 = 0.064

.

Answer:

B. 0.064

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