Approximations
Question 1: Find the number of significant Figures in each of the following measurements:

 has two significant figures
 has four significant figures
 has three significant figures
 has three significant figures
 has four significant figures
 has two significant figures
 has six significant figures
 has five significant figures
 has eight significant figures
 has four significant figures
 has four significant figures
 has six significant figures
Question 2: Round off each of the following measurements correct to four significant figures:
i)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
ii)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
iii)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
iv)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
v)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
vi)
The measurement has significant figures.
To round it off to significant figures, we require rounding it off to places after the decimal.
Therefore rounded off to significant figures.
Question 3: Round off:
i) correct to three significant figures.
ii) correct to four significant figures.
iii) correct to two significant figures.
iv) correct to three significant figures.
v) correct to one significant figure.
vi) correct to two significant figures.
Question 4: Round off:
i) to the nearest rupee
ii) to the nearest gram
iii) to the nearest paisa
iv) to the nearest cm