Cardinality in maths

Question

What is the cardinality of integers between -15 and 15

Answer 1

cardinality is the numbe of elements in a set

between -15 and +15 are

29 integers

the cardinality is 29

-14 through -1 are 14 integers

1 through 14 are 14 integers

0 is one more integer

14+14+1 = 29