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Estimatimg the number of digits in the square root of a number

Find the numb...

Question

Find the number of digits in the square root of 166.41.

A

2

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B

3

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C

4

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D

5

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Solution

The correct option is B 3
Place bars over integral and decimal parts of the number.

$¯ ¯ ¯ 1 ¯ ¯¯¯¯ ¯ 66 . ¯ ¯¯¯¯ ¯ 41$

As we got 3 bars, the square root of 166.41 will have 3 digits in it.

The correct option is B.

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