Every one who had access to a computer that could convert json into something more readable for humans, and would know that was the first thing they needed to do?

You might as well have asked how many English speakers could solve the questions if they were in Chinese. All of them. They would call up someone who spoke Chinese, pay them to translate the questions, then solve them. Or failing that, they would go to the bookstore, buy books on learning Chinese, and solve them three years from now.