Way to go! The correct answer is 9.
Your comprehension of nuances is highly advanced. You tend to have unusual, original ideas, and you can easily connect seemingly unrelated notions. You have a superior ability to reason and a very vivid imagination. Like most geniuses, you love cold showers, you talk to yourself, and you’re annoyed by the sound of chewing. Keep it up! We gave this tricky IQ problem to 150 college students and only 6 got it right. Here's the explanation:
There are 9 members in the family: 2 parents, 6 sons, and 1 sister. All 6 brothers have 1 sister, not 6 sisters.
