I know how to solve Thevenim and Norton problems, but there is a problem on a worksheet that I just don't understand.

Q) A source has an open circuit source voltage of 12V and when loaded with a 100 OHM resistor, the voltage drops to 8V. Sketch the Thevenim Equivalent Circuit, giving the values of Vthev and Rthev.

From the problem, it seems that since there is only one resistor and one voltage source, the circuit is already as simplified as it can be.

Is there something I'm missing here?