Precision refers to the closeness of a set of values obtained for identical measurement of a quantity. Precision depends on the limitations of measuring devices and the skills with which it is  used. However, accuracy refers to the closeness of a single measurement to its true value. The digits in a properly recorded measurement are known as significant figures. These are meaningful digits in a measured or calculated quantity. The greater the number of significant figures in a reported result, smaller is the uncertainty and greater is the precision. The zeros at the beginning are not counted. The zeros to the right of a decimal point are counted. In the numbers that do not contained a decimal point, “trailing" zeros may or may not be significant. The purpose of zeros at the end of a number is to convey the correct range of uncertainty. In the number 2.4560, there are 5 significant digits. Which one is the least significant digit?If we add 296.2 and 2.256, we get the answer as 298.456 g. The number of significant figures in the result are In which of the following numbers, all the zeros are not significant?