ASSIGNMENT 8 Quiz 2 on 9th Number system
1. In between two rational number there is/are:
a) Exactly one rational number
b) Infinitely many rational number
c) Many irrational numbers
d)only irrational numbers
Answer: (b)
2. The product of a rational and an irrational numbers is:
a) Always an integer
b) Always a rational number
c) Always an irrational number
d) Sometimes rational and sometimes irrational
Answer: (c)
3. The decimal expansion of an irrational number may be:
a) Terminating
b) Recurring
c) Either terminating or non- terminating
d) Non-terminating and non-recurring
Answer: (d)
4. A rational number between √2 and √3:
a) 1.9
b) (√2. √3)/2
c) 1.5
d) 1.8
Answer: (c)
5. Which of the following is irrational?
c) √5
d) √81
Answer: (c)
6. 4√5 + 5√5 is equal to:
a) 9√5
b) 9√10
c) 5√10
d) 7√5
Answer: (a)
7. Which of the following is irrational?
a) 0.4014001400014…
b) 0.14
Answer: (a)
8.√12 X √15 is equal to:
a) 5√6
b) 6√5
c) 10√5
d) √25
Answer: (b)
9. Which of the following is equal to x2?
Answer: (d)
a) 1/4
b) 1/2
c) 4
d) 1/16
Answer: (b)
Answer: (b)
12. What would be the denominator after rationalizing 7/(5√3 - 5√2)?
a) 19
b) 20
c) 25
d) None of these
Answer: (d)
