10. (12 points) Huihui and Shanshan are teachers in the senior and junior classes of a kindergarten, respectively. Huihui prepared a large bag of apples to distribute to the children in her class, with each child getting exactly 3 apples; Shanshan prepared a large bag of oranges to distribute to the children in her class, with each child getting exactly 5 oranges. However, they took the wrong bags. In the end, Huihui gave each child 3 oranges, and was short of 12; Shanshan gave each child 6 apples, and they were exactly enough. How many apples did Huihui prepare? $\qquad$
【Answer】Solution: According to the problem, we know:
Based on the total number of oranges and apples from the two teachers being just enough to distribute to the students, Teacher XiXi's fruits were later 12 less. Teacher ShanShan's students each received 1 more fruit, so Teacher ShanShan has 12 students.

Therefore, the original number of fruits Teacher ShanShan prepared is: $12 \times 5=60$.
The original number of apples Teacher XiXi had is $60+12=72$.
So the answer is: 72.