Brain teaser: Optical illusion only people with a high IQ can solve in 15 seconds

If optical illusions aren’t your thing, here are a few riddles to get your brain going, courtesy of riddles.com.

1. What can you catch but never throw?

2. Who is that with a neck and no head, two arms and no hands? What is it?

3. How do you spell COW in thirteen letters?

4. There are two monkeys on a tree and one jumps off. Why does the other monkey jump too?