Question

The number of significant figures in $5.23\times {10}^5$ is :

• A. $8$
• B. $3$
• C. $4$
• D. infinite

Answer 1

The correct option is B $3$

When numbers are written in scientific notation, then the number of digits between 1 and 10 gives the number of significant figures.

Thus, the number, $5.23\times {10}^5$ contains 3 significant figures.

All the three digits ( $5,2$ and $3$ ) are significant.

Hence, option B is correct.