## SIGNIFICANT FIGURES & RULES

SIGNIFICANT FIGURES

The significant figures of a number are digits that carry meaning contributing to its measurement resolution.

There are certain rules to find out the significant figures of a given number-

Rules 1 – All non-zero digits are significant.

Example –

1. 91 – In 91, there are two significant figures 9 & 1.
2. 123.45 – Here, there are five significant figures 1,2,3,4 & 5.

Rule 2 – Zeros between non-zero digits are significant.

Example- 101.1203 – As per the rule, there are seven significant figures in 101.1203, these are 1,0,1,,1,2,0 & 3.

Rule 3 – Leading zeros are never significant.

Example – 0.00052 – There are only two significant figures 5 & 2.

Rule 4 – In a number with a decimal point, trailing zero those to the right of the last non-zero digit are significant.

Example – 12.2300 – Here, there are six significant figures 1,2,2,3,0,& 0.

Rule 5 – In a number without a decimal point, trailing zeros may or may not be significant.

Example  – 1300 – In 1300, there are four significant figures 1,3,0 & 0.