Question

Amir arranged 9 photos on a bulletin board. He put the photos in rows. Each row contains the same number of photos. How many photos could be in each row.

Answer 1

a row is going across, you can have 3x3 but the largest is 1 photo per row, which gives you 9 rows of 1

Answer 2

Amir has 9 photos so, the first row contains 3, and the second row contains 3, and the last row contains 3, so 3+3+3=9. So each row has 3 photos.