The phone one was a bit grating because the numbers didn&#x27;t have any quantities attached to them. Though of course that would make the question trivial, if I wrote something like &quot;P = 108 - 23*d&quot;, I&#x27;d get marks off and a big (WHAT?) next to the numbers. Without specifying 108 whats it is, it could be 108 peppers or 108 bicycle-riding monkeys wearing suits. It&#x27;s more of a common sense question than an actual mathematics question.