Question

How many elements does the set A={x∣x is a natural number and x<17}A={x∣xis a natural number andx<17} have?

Answer 1

The list of numbers which are less than 13 is:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12. (12 elements)

The answer would be 12.