Zapiszmy te cztery cyfry w systemie arabskim:

CMLX to 960 

$\underset{900}{\underbrace{CM}}\underset{50}{\underbrace{L}}\underset{10}{\underbrace{X}}=900+50+10$   

 

MCLX to 1160

$\underset{1000}{\underbrace{M}}\underset{100}{\underbrace{C}}\underset{50}{\underbrace{L}}\underset{10}{\underbrace{X}}=1000+100+50+10=1160$  

 

MCXL to 1140

$\underset{1000}{\underbrace{M}}\underset{100}{\underbrace{C}}\underset{40}{\underbrace{XL}}=1000+100+40+10=1140$    

 

CMXL to 940

$\underset{900}{\underbrace{CM}}\underset{40}{\underbrace{XL}}=900+40=940$   

 

$\left|960-1000\right|=\left|-40\right|=40$  

$\left|1160-1000\right|=\left|160\right|=160$  

$\left|1140-1000\right|=\left|140\right|=140$  

$\left|940-1000\right|=\left|-60\right|=60$  

Wartość bezwzględna jest najmniejsza dla liczby 960, czyli CMLX.

$960=\underset{\text{CM}}{\underbrace{900}}+\underset{L}{\underbrace{50}}+\underset{X}{\underbrace{10}}=\text{CMLX}$   

 

Odp. A