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CBSE Questions for Class 9 Maths Number Systems Quiz 3 - MCQExams.com

Rationalise the denominator of :
 262
  •  622
  •  622
  •  6+22
  • None of these
Write the simplest rationalization factor of the following surds :
22
  • 3
  • 8
  • 2
  • 4
State whether true or false.
2+3=5
  • True
  • False
State whether true or false.
27 is a rational number.

  • True
  • False
7 is
  • A rational number
  • An irrational number
  • Not a real number
  • Terminating decimal
Are the square roots of all positive integers irrational?
  • True
  • False
State whether the following statement are true or false? Justify your answers.
Every irrational number is a real number.
  • True
  • False
The decimal expansion of the number 2 is 
  • A finite decimal
  • 1.4121
  • Non-Terminating, Recurring
  • Non-Terminating, Non-Recurring
A number that can be expressed in the form ab, where a and b are integers and b is not equal to zero is called
  • a fraction
  • an integer
  • a rational number
  • a real number
Which of the following statement is false?
  • Every fraction is a rational number
  • Every rational number is a fraction
  • Every integer is a rational number
  • All the above
Write two irrational numbers between 0.2 and 0.21.
  • 0.2010010001...
  • 0.2020020002...
  • 0.2010010001
  • 0.2020020002
If we divide a positive integer by another positive integer, what is the resulting number ?
  • Always a natural number
  • Always an integer
  • A rational number
  • An irrational number
Find two irrational numbers between 0.5 and 0.55.
  • 0.5010010001...
  • 0.5020020002...
  • 0.50101010101...
  • 0.50202020202...
Conjugate surd of ab  is:
  • a+b
  • ab
  • ab
  • a+b
The rationalising factor of 5+26 is
  • 265
  • 610
  • 625
  • 526
State true or false.
The three rational number between 5 and 6 are 214,224,234.
  • True
  • False
Simplify (32)25÷(125)23
  • 425
  • 254
  • 25
  • 52
A rational number between 14 and 13 is
  • 724
  • 1648
  • 1348
  • All the above
(1681)34 = ..........
  • 92
  • 29
  • 827
  • 278
If p: every fraction is a rational number
   q: every rational number is a fraction
then which of the following is correct?
  • p is true and q is false.
  • p is false and q is true.
  • Both p and q are true.
  • Both p and q are false.
219 is a
  • Positive rational number.
  • Negative rational number.
  • Either positive or negative number.
  • Has neither a positive numerator nor a negative number
The value of (3^{0} - 4^{0})\, \times\, 5^2 is
  • 25
  • 0
  • -25
  • none of these
Evaluate: (0.04)^{-1.5}
  • 25
  • 125
  • 250
  • 625
\displaystyle \frac{-5}{0} is a ........
  • Positive rational number.
  • Negative rational number.
  • Either positive or negative rational number.
  • Neither positive nor negative rational number.
The value of [ (-2)^{(-2)} ]^{(-3)} is

  • 64
  • 32
  • cannot be determined
  • none of these
Which of the following is a rational number (s)?
  • \displaystyle \frac{-2}{9}
  • \displaystyle \frac{4}{-7}
  • \displaystyle \frac{-3}{17}
  • All the three given numbers
A rational number is defined as a number that can be expressed in the form \dfrac{p}{q} where p and q are integers and 
  • q=0
  • q=1
  • q\neq 1
  • q\neq 0
Evaluate: (256)^{0.16}\, \times\, (256)^{0.09}
  • 4
  • 16
  • 64
  • 256.25
The value of (8^{-25}\, -\, 8^{-26}) is
  • 7\, \times\, 8^{-25}
  • 7\, \times\, 8^{-26}
  • 8\, \times\, 8^{-26}
  • None of these
The reciprocal of a positive rational number is positive.
  • True
  • False
  • Cannot be determined
  • None
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