20. Which of the following includes the set of integers?
A. Positive, negative numbers and zero
B. Only positive numbers
C. Only negative numbers
D. Positive and negative numbers
21. Which of the following integers is the least?
A. 1
B. -3
C. 4
D. -5
22. What is the sum of (-5) + (+9)?
A. + 4
B. -4
C. +14
D. -14
23. What is the difference between -21 and 9?
A. -12
B. 12
C. 30
D. -30
24. Susan borrowed Php 50 on Monday and returned Php 28 on Wednesday. How much did Susan still
owe?
A. -Php 22
B. Php 22
C. Php 78
D.-Php 78
25. The sum of two integers is O and their difference is 12. What are the two numbers?
A. +3 and +4
B. +6 and 6
C.-10 and +2
D. +10 and -2​