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  4. Which set of figures will be obtained after rounding up the following up to three significant figures? 34.216,0.04597, 10.4107

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Q. Which set of figures will be obtained after rounding up the following up to three significant figures?
$34.216,0.04597, 10.4107$

Some Basic Concepts of Chemistry

Solution:

To round up a given number, ignore the last digit as such if the digit next to it is less than $5$. Then increase it by $1$, if the next digit is greater than $5$.
(i) $34.216$
$34.22\{$ since next digit $(6)$ is greater than $5\}$
$34.2\{$ since next digit $(2)$ is less than $5\}$
(ii) $0.04597$
$0.0460\{$ since next digit $(7)$ is greater than $5\}$
(iii) $10.4107$
$10.411\{$ since next digit $(7)$ is greater than $5\}$
$10.41\{$ since next digit $(1)$ is less than $5\}$
$10.4\{$ since next digit $(1)$ is less than $5\}$