The addition of three masses 1.6 g , 7.32 g and 4.238 g, addressed up to proper decimal places is 

(1) 13.158 g

(2) 13.2 g

(3)  13.16 g

(4) 13.15 g

The area of a sheet of length \(10.2~\text{cm}\) and width \(6.8~\text{cm}\) addressed up to the proper number of significant figures is:
1. \( 69.36 ~\text{cm}^2 \)
2. \( 69.4~\text{cm}^2 \)
3. \(69~\text{cm}^2 \)
4. \(70~\text{cm}^2 \)

The uncertain digit in the measurement of a length reported as 41.68 cm is 

(1) 4

(2) 1

(3) 6

(4)  8

The number of significant figures in the measured value 0.0204 is 

(1) Five 

(2) Three

(3) Four 

(4) Two 

The number of significant figures in the measured value 26000 is 

(1) Five 

(2) Two 

(3) Three 

(4) infinite 

The number of significant zeroes present in the measured value \(0.020040\), is: 
1. Five 
2. Two
3. One
4. Three

The number of significant figures in the measured value 4.700 m is the same as that in the value 

(1) 4700 m 

(2) 0.047 m

(3) 4070 m 

(4) 470.0 m

lf a calculated value 2.7456 g contains only three significant figures, the two insignificant digits in it are 

(1) 2 and 7

(2)  7 and 4

(3) 6 and 5

(4)  4 and 6

An object of mass 4.237 g occupies a volume 1.72 cm${}^3$. The density of the object to appropriate significant figures is 

(1) 2.46 g cm${}^{-3}$

(2) 2.463 g cm${}^{-3}$

(3) 2.5 g cm${}^{-3}$

(4) 2.50 g cm${}^{-3}$

Round off the value 2.845 to three significant figures. 

(1) 2.85 

(2) 2.84

(3) 2.80

(4) 2.86