The kilograms of rice left after the 2nd day sold is:        

                 30 + 1/3 = 91/3 (kg)

The kilograms of rice the store have at first is:

                  91/3 + 2/3 = 31 (kg)

                           Answer: 31 kg of rice 

C. 2017

The effect of two numbers is:      1 x 2 = 2

Number one is:     ( 180 - 2 ) : 2 = 89

Number two is:        180 - 89 = 91

                      Answer: number one: 89

                                     number two: 91