I've looked around the wiki and the forum, but I couldn't find any definitive lists.
I am looking for simple tricks with regards to numbers, such as:
even + even = even
even x odd = even
I know that it's easy enough to do a simple example rather than memorize them. Sometimes, though, the 7-800 questions rely on 4 or 5 of these little tricks (e.g., oddxevenxeven+odd), at which point it seems easier just to memorize the tricks.
Can anyone point me to such a list of rules/tricks?
I did it all for the Starwood points.