Simple problem: x is the smallest nonnegative number that satisfies the ff:
1) x-1, when divided by a number y wherin 2<=y<=10, the remainder is y-1; and
2) x+1, when divided by a number y wherin 2<=y<=10, the remainder is always 1
What is x?
Questions for manga readers that have read up to 850ish range. The answer would most probably be speculation, but I'd like to know what you think. (WARNING: possible spoilers... the spoiler tag indicated in the first post doesn't seem to work for me >.<)