Respuesta :

I think that he will need 12
The answer to your question is 12 blocks

If you divide 6 by 3 you will get 2, which is how many blocks it takes to build a 1 step staircase. So to find out how many blocks it takes to build a 6 steps staircase you would multiply 2*6 giving you your answer which is 12.

 Hope this helps! :)