Lastly, we know what the final number of passenger is.
Retracing the steps and undoing each stage helps us solve the missing pieces in between to find that missing information.
The main idea is to identify the operation ( / – / x / ÷ ) and then reverse it to get to the previous stage.
Since we are aware that there were 24 passengers on the bus in the end, this is where we’ll start.
Now, it’s time to solve the puzzle by undoing the effects of each event to find out the original number of passengers on the bus!
Research Paper For Dummies - Problem Solving Work Backwards
Now, starting at the end of the problem, let’s try to undo each event one step at a time until we reach the beginning of the question.
The main idea is to solve the problem by reversing the steps from the back to get back to the beginning.
In order to do that, there are 2 important things that we’ll need to know: Spongey boarded the bus when there were some passengers on it.
However, as the bus travels, we know that there are 2 main events which occurred that changes the total number of passengers on the bus each time.
In addition, we are given the total number of passengers in the end.