sum involves addition so the sum of 2 and 9 equals 2+9=11
180.
The sum of 8 and 2 is 10
3 if you r talking about both
The LCM of both numbers is 21,111,102
6'9" is 81 inches.
1 to 2
The LCM of 2 and 9 is 18.
A common denominator is 90.
Any of their multiples
18
It is: 2124
144
72
180.
It is: 3
18
None of "these" numbers.