Multiplication till 400

Calculate:

Number of examples:
Numerical difficulty:
Range of values:
Multiplicity:

14	×	13	=
21	×	13	=
16	×	18	=
10	×	17	=
21	×	11	=
3	×	9	=
17	×	15	=
13	×	14	=
13	×	15	=
1	×	1	=