In this thread the idea is simple, I will choose a number and you will have to times the number by 3 and subtract half of the number, if odd you must instead of subtracting by half you subtract it by the number in the 10’s digit, like if I said 14 I would do 14 times 3 which is 42 and then since it’s even I’d divide 42 by 2 I’d get 24. Or if I said 51 I’d times it by 3 which I got 153 now I’d subtract half on 152 and one more number