It's NOT a matter of it being singular or plural, but it's actually much simpler: "another" is just "an other" written as one word. That's all there is to it! You just have to know the normal rules of articles and to remember to remove the space whenever "an" is next to "other". Keep in mind that this difference only exists in writing.

Hello! Acording my lessons the difference between these is so simple; we use another when we refer abouth singular object for example - My new car is so fast, the another one is slow And we use other to speak in plural, for example: - My brother went with his other friends go jogging I hope these examples will be useful :)

another is like saying "a other" or "1other" or "some" it can be the indefinite version of "other". The "n" is used to make it easier to say 1) 1 more 2) That which is not this 1)"I would like another cup of tea." "I cant leave here because I must help my old mother. The good weather here is another reason I don't want to live in another country." (1st meaning '1more' : 2nd meaning: "some other" or 'a country that is not this country') "The good weather here is another reason I don't want to live in any other country." contrast with: "The good weather here is another reason I don't want to live in other countries. (here "countries" is both plural and indefinite) "There must be some other solution"="There must be another solution" other means besides , aside from "Other than your brother, do you have any other relatives." "Do you have any relatives other than your brother?" "Other than leaving your mother, is there another reason you want to stay here?" "Do you want this car ? No I want the other one." "I only like 2 foods; one is ice cream, the other is cake." digeraan= others (people ) or the rest ( things) "He does not play well with others."(children that are not him) "Some say standarized tests are good , others say they are harmful." "You agree with me . All of the others think I am wrong." The history books are on the top shelf, the others are on the table. We can help one another learn.= We can help each other learn.

Hello. Here's an article in which you can find a detailed explanation. http://www.grammar.cl/english/another-other-others.htm Hope you will find it helpful.

is there some exception?