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
The value of \({{\text{2}}^{\text{8}}}\) is
  • A
    512
  • B
    1024
  • C
    256
    Correct
  • D
    128
2
Simplify and write in exponential form of \({{\text{2}}^{\text{2}}}{\text{x }}{{\text{2}}^{\text{5}}}\)
  • A
    \({{\text{2}}^{\text{7}}}\)
    Correct
  • B
    None of these
  • C
    \({{\text{2}}^{\text{5}}}\)
  • D
    \({{\text{2}}^{\text{8}}}\)
3
Simplify and write in exponential form of \({\left( {--{\text{ 4}}} \right)^{{\text{1}}00}} \times {\text{ }}{\left( {-{\text{4}}} \right)^{{\text{2}}0}}\)
  • A
    \({\left( {-{\text{4}}} \right)^{{\text{1}}00}}\)
  • B
    \({\left( {-{\text{4}}} \right)^{{\text{12}}0}}\)
    Correct
  • C
    \({\left( {-{\text{4}}} \right)^{{\text{2}}0}}\)
  • D
    None of these
4
Simplify and write in exponential form of \({{\text{5}}^{\text{2}}} \times {\text{ }}{{\text{5}}^{\text{7}}} \times {\text{ }}{{\text{5}}^{{\text{12}}}}\)
  • A
    \({{\text{5}}^{{\text{18}}}}\)
  • B
    \({{\text{5}}^{{\text{12}}}}\)
  • C
    \({{\text{5}}^{{\text{21}}}}\)
    Correct
  • D
    None of these
5
The value of \({{\text{2}}^{\text{2}}}\) is
  • A
    4
    Correct
  • B
    5
  • C
    None of these
  • D
    3
6
The exponent in the expression \({{\text{3}}^{\text{7}}}\) is _______ .
  • A
    None of these
  • B
    1
  • C
    7
    Correct
  • D
    3
7
The value of \({{\text{3}}^0}\) is ________ .
  • A
    1
    Correct
  • B
    3
  • C
    None of these
  • D
    9
8
The value of \({{\text{5}}^0}\) is ________ .
  • A
    None of these
  • B
    1
    Correct
  • C
    10
  • D
    5
9
The value of \({{\text{7}}^0}\) is ________ .
  • A
    None of these
  • B
    1
    Correct
  • C
    21
  • D
    7
10
The value of \({\text{1}}{{\text{1}}^0}\) is ________ .
  • A
    None of these
  • B
    3
  • C
    11
  • D
    1
    Correct
11
Multiplicative inverse of \(\frac{1}{5}\) is
  • A
    5
    Correct
  • B
    10
  • C
    3
  • D
    None of these
12
Multiplicative inverse of \(\frac{1}{7}\) is
  • A
    49
  • B
    7
    Correct
  • C
    None of these
  • D
    14
13
Multiplicative inverse of \(\frac{1}{3}\) is
  • A
    10
  • B
    2
  • C
    None of these
  • D
    3
    Correct
14
Multiplicative inverse of 9 is
  • A
    None of these
  • B
    9
  • C
    3
  • D
    \(\frac{1}{9}\)
    Correct
15
Multiplicative inverse of 21 is
  • A
    None of these
  • B
    \(\frac{1}{{21}}\)
    Correct
  • C
    7
  • D
    21