其它
SASMO 2015 P2 Q2  For the number sentence below, what is the answer?  $$15+15+15+15+15+15+15+15+15+15+15+15+15+15+15$$ 
Overseas Competition->Knowledge Point->Counting Modules->Law of Addition and Multiplication
7 x 30 + 15 = 210 + 15 = 225 