This money puzzle is all about following the steps in the exact order given. You begin with $300 and first remove $100.
That leaves $200. The next instruction says to remove half of what is left. Half of $200 is $100, so removing that amount leaves another $100.
Answer: $100.
A common mistake is to take half of the original $300 rather than half of the amount remaining after the first subtraction. Reading the wording carefully makes this one straightforward.


