We bet you think you’re pretty smart (and if you’ve found your way to mental_floss, you probably are!). But common sense questions and brain-teasing puzzles can challenge even those with the highest IQs. You may be an egghead—but are you an idiot?

Test your brainpower with these eight puzzles from Game Show Network’s Idiotest. The rules are easy: Read the question in each picture puzzle, and select the image you think best answers the question. Limit yourself to just 30 seconds for each picture—speed is part of the challenge! Click the link at the bottom of the page for the solutions and explanations.

1.

2.

3.

4.

5.

6.

7.

8.

Click here to see how you did!

Look sharp! Feed your brain every Wednesday by watching Idiotest’s all-new season, premiering on Game Show Network April 1 at 8/7c.