Help with my daugther's grade 3 question.
a= b+1 b= c+1 abc = 120
I know the solution is a= 6, b= 5, and c= 4 but i cannot calculate it logically without guessing.
abc= 120 (c+2)(c+1)c=120
c3+3c2+2c=120
How do I get C?
Is there a way to calculate it?