Find the greatest common factor of 14, 20, and 25.

14=2                       20=2                            25=5
 7=7                        10=2                              5=5  
 1=1                         5=5                               1=1        
so the one for 14     1=1                                so the answer for 25
would be 2*7           so the answer for 20      would be 5*5
                                would be 2*2*5 or 4*5

the reason that i did not put the one into the math problems is because anything times one is its self so i hope that this helps