b. a 72 a. 9. The set of numbers which includes zero, positive numbers and negative numbers a counting numbers b, whole numbers c. integers d. natural numbers 10. Which of the following numbers is not an integer? b. - 1 c. 1 d. % 11. Which of the following statements is true? a. 4 < -1 b. -4 >-2 c. 5 < 3 d. -9 ​