Motorcycle travel time is :

            9 h 42' - 8 h 30' = 1 h 12'

          Or : 1,2 h

       The speed of motobike :

             60 : 1,2 = 50 ( km/h )

                   Answer : 50 km/h

That number is : 99

5 apples

That number is 6

The numbers are 0 ; 2 ; 4 ; 6 ; 8.

5 apples

2 oranges

The first number is : 100

Last number is : 998

               Number with three digits that share for 2 is :

                              ( 998 - 100 ) : 2 + 1 =  450 ( numbers )

                                           Đ/s : 450 numbers.