Out of 30 students, 20 are studying Spanish, 7 are studying Chinese, and 3 are studying both Spanish & Chinese.
How many are not studying either language.
The first new player to comment on the website with the correct answer wins a free drink at their next iQ Trivia quiz.
20-3 =17
17+7 =24
30-24 = 6 studying neither
Pretty simple, but a lot of people struggle to work it out.