In the name of testing creativity researchers can go to any extent. Consider this example I picked it from the book :59 Seconds by Professor Richard Wiseman.
Can you add a single line to the following equation to make it correct? ('not equal to' is not a solution):
l0 l0 ll = l0.50
Spend some time here. Then uncover the answer hidden in the gray box below (click and drag):
Place a horizontal line over the second 'l' to get
l0 TO ll = l0.50
(It is time: Ten to Eleven = Ten-Fifty)
Now if you are a normal person, then chances are that you could not solve it. Unless someone has a funny sort of creative mind, this cannot be solve. Why? No one writes Ten-Fifty as 10.50. The convention is to write it as 10:50, right?
What is the purpose of such exercises? Does it really test your creativity? Or perhaps, researchers derive some sadistic pleasure by deliberately misleading.