I thought of Carrot too. But I suspect my reasoning was very different from most others.
While I was doing the test, it reminded me of another similar test.
1. What is 4 + 20?
2. What is 29 - 5?
3. What is 6 x 4?
4. Think of a vegetable.
Most people would answer carrot on this test. Why? Because most people think, "24", "24", "24", and then they subconsciously think 24 CARRAT GOLD ----> CARROT.
I learned this in a Psychology course, and most of the class guessed "Carrot."
I have no idea why other people thought of carrot for the original post.