Question

How many significant figures should be present in the answer of the following calculations? 

(i) 0.02856×298.15×0.112/0.5785 

(ii) 5 × 5.364 

(iii) 0.0125 + 0.7864 + 0.0215

Answer 1

(i) Least precise term i.e. 0.112 is having 3 significant digits. 

∴ There will be 3 significant figures in the calculation. 

(ii) 5.364 is having 4 significant figures. 

∴ There will be 4 significant figures in the calculation. 

(iii) Least number of decimal places in each term is 4. 

∴ There will be 4 significant figures in the calculation.