Practice portal › Units and Measurements › Significant Figures and Rounding

A person measures mass of 3 different particles as 435.42 g, 226.3 g and 0.125 g. According to the rules for arithmetic operations with significant figures, the addition of the masses of 3 particles will be

Asked in JEE Main 3rd April 1st Shift 2025 · Significant figures and rounding

• (1) 661.8 g
• (2) 661.845 g
• (3) 661.84 g
• (4) 662 g

Step-by-step solution

Why the other options are wrong

• (2) comes from keeps all three decimal places, a precision 226.3 g does not support
• (3) comes from keeps two decimal places, the precision of 435.42 rather than of the coarsest term
• (4) comes from rounds to whole grams, which is coarser than any of the three measurements

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.