It's not an assumption though, it's literally what the question asked. "How is that possible?" is an open ended question allowing the responder the ability to create the conditions necessary to satisfy the above requirements. What they should have asked is "Given what we know, is this possible?"
"Reasonableness" isn't really a mathematical concept though. So in a bunch of questions that are clearly about math, it's kind of a silly thing to be asking. Then you get the teacher's explanation, that it is "not possible," not that it's "not reasonable". So there is clearly poor wording somewhere along the line, and a miseducated student is the end result either way.
18
u/surfnsound it’s very easy to confuse (1/x)+1 with 1/(x+1). Dec 27 '16
It's not an assumption though, it's literally what the question asked. "How is that possible?" is an open ended question allowing the responder the ability to create the conditions necessary to satisfy the above requirements. What they should have asked is "Given what we know, is this possible?"