The following is an example of a True/False/Don't know question that is negatively marked:

Three (3) is an example of an odd number. 

Note, that you will lose 50% of the mark for this question if you choose the incorrect option. If you are not sure about the answer and do not want to guess, choose the "Unsure" option. You will neither receive marks for the question nor will you lose marks for choosing this option.