question_answer

A milk vendor has 21 litres of cow milk, 42 litres of toned milk and 63 litres of double toned milk. If he wants to pack them in cans so that each can contains same number of litres of milk and does not want to mix any two kinds of milk in a can, then the least number of cans required is

A)  3                                

B)  6

C)  9                    

D)       12