Q: The respective number of significant figures for the numbers 23. 023 , 0.0003 and 2 × 10-3 are
Sol. (i) All non – zero numbers are significant figures. Zeros occurring between zero digits are also significant.
(ii) If the number is less than one, zero between the decimal and first non zero digit are not significant.
(iii) Powers of 10 is not a significant figure.
∴ 5, 1, 1.