Gabby was joking right?

There was one point in the challenge were she literally said, "she did 23 times 4,she must be like really good at her periodic tables", without a hint of humour in her voice or on her face. I'm misreading the situation right, there is no way she could have been serious. Exit:my bad ik now she was joking, I just wanted to check cos I didn't know that much about her