Answer:
4
Explanation:
Given that,
There were two groups.
One group received 28 baseball cards. A seconds group received 56 baseball cards.
If each person entering the stadium received the same number of cards, we need to find the greatest possible number of baseball cards that each person could have received.
Firstly, we will factors of 28 and 68 as follows :
The factors of 28 are 1 x 2² x 7
The factors of 68 are 1 x 2² x 17
Greatest common factors = 4
Hence, the greatest possible number of baseball cards are 4.