Lets say you must take x one-way rides. And you want the cost of the one-way rides’ total to be bigger than the pass so that it’s a better deal:
1.25x > 41
Now solve:
1.25x > 41
x > 41/1.25
x > 32.8
There are no rides sold in decimals so you have to round it up to 33. The least number of one-way rides is 33.