Class 7 Exponents And Powers CBSE Questions & Answers

Class 7 · Exponents And Powers

This is Mathematics Class 7 Exponents and Powers CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
What number should be multiplied by \({\left( { - {\text{8}}} \right)^{ - {\text{1}}}}\)so that the product may be equal to \({\left( {{\text{1}}0} \right)^{ - {\text{1}}}}\)?
  • A
    None of these
  • B
    -4
  • C
    \(\frac{{ - 4}}{5}\)
    Correct
  • D
    5
2
Which one of the following is the value of\({{\text{1}}^{{\text{15}}}}\)?
  • A
    1
    Correct
  • B
    None of these
  • C
    0
  • D
    15
3
Fill in the blank : \({\left( {{\text{ }} - {\text{1 }}} \right)^{{\text{even number}}}} = {\text{ }}\_\_\_\_\_\_\_\_\_\_\_\_\_\).
  • A
    0
  • B
    None of these
  • C
    1
    Correct
  • D
    -1
4
Fill in the blank : \({\left( { - {\text{1}}} \right)^{{\text{odd number}}}} = {\text{ }}\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.\)
  • A
    1
  • B
    0
  • C
    -1
    Correct
  • D
    None of these
5
Value of \(\left( {{\text{ }}{{\text{3}}^0} + {\text{ }}{{\text{2}}^0}} \right) \times {{\text{5}}^0}\) is
  • A
    0
  • B
    10
  • C
    1
  • D
    2
    Correct
6
The value of \({{\text{7}}^{\text{2}}}\) is ___________ .
  • A
    14
  • B
    49
    Correct
  • C
    7
  • D
    21
7
The Base in the expression \({{\text{8}}^{{\text{1}}0}}\) is _______________ .
  • A
    10
  • B
    2
  • C
    8
    Correct
  • D
    80
8
The value of \({\text{1}}{00^0}\) is ________________ .
  • A
    10000
  • B
    100
  • C
    10
  • D
    1
    Correct
9
Find the number from the following expanded form : \({\text{9}} \times {\text{1}}{0^{\text{5}}} + {\text{ 2}} \times {\text{1}}{0^{\text{2}}} + {\text{ 3}} \times {\text{1}}{0^{\text{1}}}\)
  • A
    900230
    Correct
  • B
    900203
  • C
    903503
  • D
    912350
10
Value of \({\left( {{\text{ }}{{\text{2}}^{\text{3}}}} \right)^{\text{2}}}\) is given by ______________ .
  • A
    8
  • B
    32
  • C
    16
  • D
    64
    Correct
11
The value of \({{\text{7}}^{\text{2}}} \div {\text{ }}{{\text{7}}^{\text{3}}}\) is given by ___________ .
  • A
    None of these
  • B
    \(\frac{1}{7}\)
    Correct
  • C
    \(\frac{1}{{14}}\)
  • D
    7
12
The value of \(\frac{1}{{{3^3}}}\) is
  • A
    \(\frac{1}{3}\)
  • B
    \(\frac{1}{9}\)
  • C
    None of these
  • D
    \(\frac{1}{{27}}\)
    Correct
13
In exponential form 140,000,000,000 is given by _______________ .
  • A
    \({\text{1}}.{\text{4}} \times {\text{1}}{0^{{\text{11}}}}\)
    Correct
  • B
    None of these
  • C
    \({\text{1}}.{\text{4}} \times {\text{1}}{0^{{\text{1}}0}}\)
  • D
    \({\text{1}}.{\text{4}} \times {\text{1}}{0^{{\text{12}}}}\)
14
The expression , \({\left( {{\text{ }}{{\text{5}}^{\text{2}}} + {\text{ }}{{\text{7}}^{\text{2}}} + {\text{ }}{{\text{3}}^{\text{2}}}} \right)^0}\)is equals to
  • A
    15
  • B
    49
  • C
    25
  • D
    1
    Correct
15
The value of \({\left( {\frac{1}{8}} \right)^2}\) is
  • A
    None of these
  • B
    \(\frac{1}{8}\)
  • C
    \(\frac{1}{{64}}\)
    Correct
  • D
    \(\frac{1}{{16}}\)