We can reduce random errors by 

(1) Taking large number of observations  

(2) Corrected zero error 

(3) By following proper technique of experiment 

(4)  Both (1) & (3) 

The volume of a cube having sides 1.2 m is appropriately expressed as 

(1) $1.728\times {10}^6 c{m}^3$
$$

(2) $1.7\times {10}^6 c{m}^3$
$$

(3) $1.8 \times {10}^6 c{m}^3$
$$

(4) $1.73 \times {10}^6 c{m}^3$

The number of significant figures in a pure number 410 is 

(1) Two 

(2) Three 

(3) One 

(4)  lnfinite 

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