Dividing till 100

Calculate:

The number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

77	/	11	=
9	/	1	=
80	/	16	=
21	/	7	=
90	/	15	=
42	/	21	=
50	/	5	=
18	/	3	=
88	/	11	=
42	/	7	=