Stupid question! Confusing us to think in wrong way..... $ a1 C. z* @- Q% B E( P% ~9 e0 b
this sentence: 9x3+服務生暗藏的2元=29元...... ...trick us!!!作者: karen0123 時間: 2007-2-5 04:55 PM
應該係咁計 ; L2 Z3 S! ?) V ) R1 I% m) e! l" n1 n$ _ w5 A/ T一開始每人出10元=3*10=30# [5 B. y) `8 u4 _
老闆話特價25元=30-5 / d: v" a, I. ^2 c個侍應偷左2蚊=果三個人總共要用多2蚊=30-5+2=27 4 h( {- [, a5 q7 [0 \# F所以個侍應偷左2蚊後,每人就要用(30-5+2)/3=9元作者: ming1226 時間: 2007-2-5 05:04 PM