Let us break up the question step by step.
We are looking for a number - let's call it x - that is less than 453, 000.
Thus: x < 453, 000
This number is also more than twice 225, 600. Thus:
x > 2*225, 600
x > 451, 200
Combining this information, we can now say that the number is in between 451, 200 and 453, 000. Thus:
451, 200 < x < 453, 000
We are also given that the number has a 6 in the tens place. Now, let's write out possibilities given the constraints we defined above:
451 260, 451 261, 451 262, .... 451 269
451 360, 451 361, 451 362, .... 451 369
You could continue in this very same manner until you reached 452 969, which is the maximum value that meets these constraints, however since we are only required to find two numbers that Jada could be thinking of, we can choose any two at all, for example 451 260 and 452 969.
The key here is to just work through the information given step by step to arrive at a set of constraints that our value must take.
Hope that helped, but if you have any further questions please feel free to comment below :)