Brent needs 6 rows to display the balls.
Explanation:
Given,
Number of ball from American League games Brent has = 54
Number of ball from National League games he has = 42
To find out the number of rows to display the given balls.
We need to find out the GCF of 54 and 42.
Now,
54 = 3×3×3×2
42 = 7×3×2
GCF = 3×2 = 6
Hence,
Brent needs 6 rows to display the balls.