Upper and Lower Bounds

To work out the upper bound/maximum possible answer of two given numbers (a AND b):

Add the two largest numbers (the upper bounds of both numbers)!

To work out the lower bound/minimum possible answer of two given numbers (a AND b):

Add together the two smallest numbers (lower bounds of both numbers)!

To work out the upper bound/maximum possible answer of two given numbers (a X b):

Multiply the two largest numbers (the upper bounds of both)!

To work out the lower bound/minimum possible answer of…