The integer x has 12 positive factors. The numbers 12 and 15 are factors of x. What is x?
If 12 and 15 are factors then LCM(12,15)=60 is a factor
Thus 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
are the 12 factors of x=60
thanks!
+142 
