question_answer

If each  stands for 3 kg, what is the mass of the box Q?

A)  12kg                                     

B)  14kg

C)   8kg                                      

D)   10kg

Correct Answer: A

Solution :

Each  stands for 3 kg. Then 6 Os = 4  = 4 \[\times \] 3 kg = 12 kg \[\therefore \] Each 0 stands for 12 \[\div \] 6 = 2 kg The mass of box Q = 2 \[\times \]  + 3 \[\times \] 0 = 2 \[\times \] 3 + 3 \[\times \] 2 = 6 + 6 = 12 kg