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# The number of significant figures in $3400$ is: A. 4 B. 1 C. 3 D. 2

Last updated date: 13th Jun 2024
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Hint: Significant figures are the numbers which possess valuable positional values.   There are four rules which govern the significant rules.  This is useful in estimating and rounding off the values to their nearest significant figures. However these are only approximate.

The number of significant figures in $3400$, according to rule 4, the number of significant figures is either $\text{4 or 2}$ and clearly not $\text{1 or 3}$. Now since $3400$ is a whole number we can say that it has two significant figures, as the  zeros in the left don’t have any value and can be expressed as $3400=34\times 10^{2}=3.4\times 10^{3}$, still we get two significant figures. Thus the number of significant figures in $3400$ has two significant figures as it is a whole number.