Question

Marilyn has 28 Styrofoam cubes to stack in a pyramid. Each row will have one cube fewer than the one below it. How many cubes will be on the bottom row of the pyramid? A) 6 cubes B) 7 cubes C) 8 cubes D) 9 cubes

Answer 1

7, it’ll be a total of 28 if you add all together 1+2+3+4+5+6+7 with 7 being the last row