- #1
pivoxa15
- 2,255
- 1
It seems that many hardish elementary (senior high school, first year university) maths problems are about using some type of 'trick' or method which is not obvious at first sight and they are not usually taught as only the standard methods are taught.
Are there books out there that concisely list many of these 'tricks'?
Are there books out there that concisely list many of these 'tricks'?