9th Math Online Quiz Test of Chapter 1

1. Which of the following is an irrational number?

a) 3/4
b) √2
c) 0.75
d) -7

2. 0.333… (recurring) is a:

a) Irrational number
b) Rational number
c) Whole number only
d) Negative integer

3. The number of rational numbers between any two rational numbers is:

a) Zero
b) One
c) Infinite
d) Two

4. Which decimal expansion represents an irrational number?

a) 0.454545…
b) 0.6666…
c) 1.414213562… (non-recurring)
d) 0.25

5. Real numbers include:

a) Rational numbers only
b) Irrational numbers only
c) Both rational and irrational numbers
d) Integers only

6. 0.47̅ (0.4777…) as a fraction is:

a) 47/99
b) 47/100
c) 4/9
d) 43/90

7. √4 is a:

a) Irrational number
b) Rational number
c) Negative number only
d) Non-real number

8. Which statement is true?

a) All integers are rational numbers
b) All rational numbers are integers
c) No irrational number is real
d) Zero is an irrational number

9. The proof that √2 is irrational uses:

a) Direct method
b) Method of contradiction
c) Trial and error
d) Graph method

10. Between two rational numbers there are:

a) No real numbers
b) Only one rational number
c) Infinitely many rational and irrational numbers
d) Only integers