Answer:
88 pineapples
Step-by-step explanation:
The last digit can only be 8 since it will be a multiple of 4 and also a multiple of 5+3. It can't be 2 or 0 since 5 would be 9 or 7 and you can't have a fraction of a pineapple.
Therefore, we can test 88 first since it asks for the maximum amount. 88 fulfills the requirements, since if we divide by 5, we get a remainder of 3, and if we divide by 4 we get no remainder.