Question

Which of the following numbers are positive integers +5,-3,0,-1,7,+11 and -15?

Answer 1

All the presented numbers are not decimal number, because thay don't have decimal places, so all of them are integers.

Every number without a negative number appart from 0 is a positive number, so -3, -1 and -15 are not positive integers. Also, 0 is neither positive nor negative, so even though it don't have a negative sign it is not positive.

So, the only positive integers of the list are +5, 7 and +11.