1) √2 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 2) -64 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 3) 10 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 4) -3 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 5) 4 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 6) (-9)2 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 7) 0.5 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 8) Which one of these numbers is an example of an irrational number? a) √2 b) 2 c) -3 d) 0.5 e) 1/9 f) (-2)3 9) Which one of these numbers is an example of a natural number? a) (-1)2 b) (-9) c) (-20009) d) -0.5 e) -√3 f) -1999 10) -90 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 11) 0 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 12) √4 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 13) -1 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 14) 78 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 15) 2/2 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 16) √23 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 17) -90 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 18) 28 a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 19) -(1/64) a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 20) π a) ℕ - Natural Number b) ℤ - Integer Number c) ℚ - Rational Number d) Irrational Number e) ℝ - Real Number 21) Which one of these symbols represents the sets of rational numbers? a) ℝ b) ℕ c) ℤ d) ℚ 22) Which of the symbols represents the set of numbers that does not include all of the numbers -3, 4 and 9? a) ℕ b) ℤ c) ℚ d) ℝ 23) Which of the symbols represents the set of numbers that is most suitable for measuring the circumference of a ball? a) ℚ b) ℝ c) ℤ d) ℕ

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