- A15
- B30
- C45
- D75
Step-by-Step Solution
From back to front the rows are 5, 4, 3, 2 and 1 cubes high, and each row is 3 cubes wide: . (15 is one slice of the staircase.)
Answer: C) 45
A staircase with five steps is built from cubes; it is three cubes wide and each step is one cube deep. How many cubes are in the staircase?
Competition practiceDice & Cubes
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Dice & Cubes practice questions
More Dice & Cubes practice
In this five-step staircase of cubes, three cubes wide, how many cubes are completely…Which drawing (a) to (d) is the front view of this stack, looking in the direction of…Seen from directly above, which plan (a) to (d) shows the squares covered by these…This stack is two cubes wide and four rows deep. Which drawing (a) to (d) shows it from…A stack of cubes covers part of a grid 3 squares wide and 2 deep. Its front and side…