To determine the greatest number of treat bags that Devon can make while ensuring that each bag has the same number of stickers and the same number of pieces of fruit, we need to find the greatest common divisor (GCD) of the total number of stickers and pieces of fruit he has.
Devon has:
- 25 stickers
- 15 pieces of fruit
Now, we need to find the GCD of 25 and 15.
Step 1: Prime factorization
- The prime factorization of 25 is \(5^2\).
- The prime factorization of 15 is \(3^1 \times 5^1\).
Step 2: Identify common factors The only common prime factor is 5.
Step 3: Calculate GCD The minimum power of the common prime factor (5) in both factorizations is \(5^1\).
Thus, the GCD of 25 and 15 is 5.
Therefore, the greatest number of bags Devon can make is 5.
So, the greatest number of bags is \( \boxed{5} \).