41 & 42...sum=83 is not correct. Question says "less than 83"
40+42=82 is not correct. 40+42 are not consecutive integers.
The highest summing pair that meet the questions requirements are 40+41=81
A+B<=82 & A=B+1
A+(A+1)<=82
A<=40.5 but A is an integer so A=40 A+1 =41