|---+----+----+------+------|
| 2 | (3) | 4 | (15) | 12 | 3 x 5 =15 , 3 x 4=12
|---+----+----+------+------|
| 3 | (4) | 5 | (28 ) | 20 | 4 x 7 = 28 , 4 x 5 =20
|---+----+----+------+------|
| 4 | (5 ) | 6 | (45 ) | 30 | 5 x 9 = 45 , 5 x 6 =30
|---+----+----+------+------|
| 5 | (6) | 7 | (66) | 42 | 6 x 11= 66 , 6 x 7 =42
|---+----+----+------+------|
| 6 | (7) | 8 | (?) | 56 | 7 x 13 = 91, 7 x 8 =56
|---+----+----+------+------|
good job
