Because they’re both made of zinc.
(haven’t read any other posts)
19 is my instant assumption too, based on the pattern of:
The 6s are just separators, and the remaining numbers, starting with 4, are being increased by 5… 4+5=9,9+5=14,14+5=19.
I zinc not!
You have to have some brass reproductive organs to make puns like that.
I would have gone with iron since it’s the only one that won’t release energy through either fusion or fission.
I don’t like odd one out answers like that. They should be “it’s the only one that isn’t …” rather than “it’s the only one that is …”
Or to put it another way, all but one have a certain quality, rather than one has a quality that all the others lack.
Or, the correct answer is “aluminum, because it’s the only one with an accepted alternate spelling in [UK] English.”
I agree. Sorta …
In many cases the presence or absence of a quality is a matter of phrasing, not a matter of fact. Here’s a less-than-ideal example I just made up.
Among “eagle, squirrel, dog, cat” do some of the animals have or lack four-footedness or do they have or lack 2-footedness? Does the answer to the “lack” question change if the list changes to “eagle, crow, robin, cat”? Darn good questions. Unanswerable ones IMO.
Obviously once we decide that leg count is the differentiator, determining the odd critter out is easy. But deciding which is a lack and which is not a lack is a much more nebulous idea.
And so therefore using lack-ness as a feature of defining well- or poorly-posed puzzles probably creates as many problems as it solves.
Isn’t that exactly what the answer is? All the other elements have strong nuclear potential energy that can be released, Iron doesn’t.
I suppose so. I quoited the wrong one to make my point. The only one with a colour, or the only one that is magnetic would have been better.
Also, I don’t understand the science of strong nuclear energy, so it went over my head.