-21, 27
It is: 21*21 = 441
1, 3, 7, 9, 21 and 63: 1 x 63, 3 x 21, 7 x 9
The numbers are: 21 and -10
21
-21, 27
141
3 & 49; 7 & 21
-1
It is: 21*21 = 441
The numbers are: -1 and -20
1 x 63, 3 x 21, 7 x 9
24 & 3
1, 3, 7, 9, 21 and 63: 1 x 63, 3 x 21, 7 x 9
The numbers are: 21 and -10
The numbers are: 3 -sq rt of 21 and 3 +sq rt of 21
21