1 x 189, 3 x 63, 7 x 27, 9 x 21.
255
189
You need at least two numbers to find a GCF.
There are infinitely many pairs. An easy pair to remember is 1 and 189.
There are many possible answers. The simplest of these is 1 and 189.
How about: 3*189 = 567
There are infinitely many possible answers. For example: 1*189 10*18.9 100*1.89 2*94.5
3 x 63 = 189 3 + 63 = 66
1 and 189 3 and 63 7 and 27 9 and 21
Since 189 is a multiple of both 9 and 27, it is automatically the LCM.
255
Pairs of numbers whose sum is -14 and that are factors of -189 include -7 and -7, and -21 and 7.