Answer: I think it would be Y+(9-j)
The two numbers can be any factors of 120. This includes: (1,120) (2,60)(3,40)(4,30)(5,24)(6,20)(8,15)(10,12) and the reverse of this. The smallest perimeter would be the two numbers that are closer together, which is 10 and 12.
Yes, Absolute value is the magnitude of a number irrespective of its sign.
