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Quiz (Number & Number Systems)

Which of the following is considered a natural number?
- a) -3
- b) 0
- c) 2.5
- d) 5
Real numbers include:
- a) Rational numbers
- b) Irrational numbers
- c) Both a and b
- d) Neither a nor b
Which number system includes both positive and negative whole numbers?
- a) Natural numbers
- b) Real numbers
- c) Integers
- d) Rational numbers
The number √2 is an example of a:
- a) Rational number
- b) Natural number
- c) Whole number
- d) Irrational number
What is the primary difference between rational and irrational numbers?
- a) Rational numbers can be expressed as fractions, irrational numbers cannot
- b) Rational numbers are always whole numbers, irrational numbers are not
- c) Rational numbers are less than zero, irrational numbers are greater than zero
- d) Rational numbers cannot be expressed as decimals, irrational numbers can
Which of the following is an example of a rational number?
- a) π (Pi)
- b) 4/5
- c) √3
- d) e (Euler’s number)
What is the set of natural numbers usually denoted by?
- a) ℝ
- b) ℤ
- c) ℕ
- d) ℚ
Which number is NOT a part of the real number system?
- a) 7
- b) -1
- c) √-1 (i)
- d) 3.14
The number 0 is considered to be:
- a) A natural number
- b) An integer
- c) A real number
- d) Both b and c
The set of rational numbers is denoted by which symbol?
- a) ℕ
- b) ℚ
- c) ℤ
- d) ℝ

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