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CBSE Questions for Class 9 Maths Number Systems Quiz 2 - MCQExams.com

Two rational numbers between 23 and 53 are :
  • 16 and 26
  • 12 and 21
  • 56 and 76
  • 23 and 43
State true or false:
There are numbers which cannot be written in the form pq, where q0  and both p, q are integers.
  • True
  • False
The value of 23+3 is equal to
  • 26
  • 33
  • 46
  • 6
Between any two rational numbers, 
  • there is no rational number
  • there is exactly one rational number
  • there are infinitely many rational numbers
  • there are only rational numbers and no irrational numbers
Every rational number is
  • A natural number
  • An integer
  • A real number
  • A whole number
The product of a non - zero rational number with an irrational number is always :
  • Irrational number
  • Rational number
  • Whole number
  • Natural number
2,3 are
  • Whole numbers
  • Rational numbers
  • Irrational numbers
  • Integers
State whether the given statement is True or False.
After rationalising the denominator of 53223, we get its denominator as 7.
  • True
  • False
Find the product. (a2)(2a22)(4a26)

  • 8a40
  • 8a50
  • 8a30
  • 820a
The value of (6+27)(3+3)+(123) when simplified is :
  • positive and irrational
  • negative and rational
  • positive and rational
  • negative and irrational
The value of 30+7050 is:
  • 2
  • 0
  • 95
  • 15
5 is an irrational number.
  • True
  • False
Find the five rational numbers between  12 and 32
  • 0.5<0.6<0.7<0.8...<1.1<...<1.15<1.50
  • 0.5<0.6<1.7<3.8...<1.8<...<1.15<1.50
  • 0.5<0.6<0.7<2.8...<1.1<...<1.15<1.50
  • 0.5<0.6<0.7<0.8...<3.1<...<1.15<1.50
Which of the following numbers are rational ?

  • 1
  • 6
  • 312
  • All above are rational
The rationalizing factor of (a+b) is
  • ab
  • ab
  • ab
  • None of these
Simplify:
33+103
  • 133
  • 103
  • 123
  • 113
The value of 53312+275 on simplifying is :
  • 53
  • 63
  • 3
  • 93
State True or False.
A rational number can always be written in a fraction ab, where a and b are not integers (b0).
  • True
  • False
Find conjugate of:
3+2
  • 32
  • 3+2
  • 32
  • None of these
Rationalise the denominator of :
 612
  •  26
  •  25
  •  22
  •  23
Find conjugate of:
32 -1


  • 32 +1
  • 32 -1
  • 32
  • None of these
Rationalise the denominator of :
 223
  •  273
  •  263
  •  223
  •  2610
Rationalise the denominator of :
 6102
  • 102
  • 10+2
  • 210
  • None of these
Rationalise the denominator of:
 25+3
  • 53
  • 43
  • 23
  • 63
Rationalise the denominator

(i)  2223+1
  • (231)
  • 3(231)
  • 2(231)
  • 4(231)
Write the simplest rationalisation factor of the following surds:
32
  • 2
  • 7
  • 5
  • 3
State whether true or false.
511 is a rational number.

  • True
  • False
Rationalise the denominator of :
 57+2
  • 7+2
  • 72
  • 72
  • None of these
State true or false:
There can be a pair of irrational numbers whose sum is irrational such as
3+2 and 5+2.
  • True
  • False
State true or false:
3 is an irrational number

  • True
  • False
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