Multiplication till 400

Calculate:

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

18	×	14	=
10	×	10	=
17	×	15	=
21	×	12	=
4	×	1	=
20	×	14	=
10	×	5	=
23	×	13	=
13	×	24	=
6	×	4	=