FAMILY MATHS CHALLENGE

THIS IS THE QUESTION TO THIS WEEKS FAMILY MATHS CHALLENGE.

THIS STAIRWAY IS MADE OF CUBES. HOW MANY CUBES WOULD BE NEEDED TO MAKE THE STEPS 9 STEPS HIGH?

I FIGURED IT OUT BY DRAWING THE PICTURE OF THE STEPS THEN ADDED ONE STEP MORE TILL I GOT TO NINE STEPS THEN I ADDED UP 6 +29=45 AND THAT IS HOW I GOT THE ANSWER.