Method 1: 75 - 31 = 44, half of 44 is 22 which is the smaller number so the larger is 53.
Method 2: 75 = 38 + 37, difference 1. Add 15 to 38 and subtract 15 from 37 and you get 53 and 22.
The choice is yours...
12 and 24?
19 and 34
28 and 36
20 & 3
18 and -6.
67 and 99
Subtract the difference and half your answer, giving 9 which is the smaller number, add the difference to this and you get 38 which is the larger number.
22 and 26
29 and 36
6 & 4
37 and 21
19 and 34
28 and 36
20 & 3
12 and 24?
18 and -6.
The answer is: 3