You have to ask your questions in code:

1. What can sting you? (code: 28056 / 12)

2. What do most bicycles have? (code: 15263 + 12475)

3. What keeps a car engine runnning smoothly? (code: 166,140 / 234)

4. What do snails have? (code: 842,514 - 265,169)

Have you cracked the code yet?