Because three numbers of three and five numbers of five are both greater than 1, that is to say, this number is a multiple of three and five and greater than 1. In other words, this number is the least common multiple of three to five and is greater than 1, calculated according to the least common multiple of three to five.

The least common multiple of 3 and 5 is:

3×5= 15

15+ 1= 16

In other words, there are at least 16 apples.

How much is an uncertain factor.

(3×5)×n+ 1

N is 1~ infinite times. As long as it is a multiple of 3×5 plus 1, it is the number of these apples.

Finally, to sum up, these apples are:

(3×5)×n+ 1