Ok, so I posed both questions to my wife, and she answered both correctly, only pausing about 2 to 3 seconds before answering both. She then said the questions are stupid and are too elementary. Maybe this study is not foolproof and is only there to make people like me feel better about not being able to answer simple math questions better :P
Basically, once again, I've learned that my wife is smarter than me and that these studies should be taken with a grain of salt.
P.S. She is not a math person nor is she a tech person.