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
\({\text{1}}{0^{\text{2}}}\_\_\_\_\_{\text{ }}{{\text{2}}^{{\text{1}}0}}\)
  • A
    =
  • B
    None of these
  • C
    <
    Correct
  • D
    >
2
\({8^{13}} \div {8^{19}} = \frac{1}{{{8^{...}}}}\)
  • A
    8
  • B
    3
  • C
    2
  • D
    6
    Correct
3
Expanded form of \({a^{\text{4}}}\)is ___________.
  • A
    \(a{\text{ }} \times {\text{ }}a{\text{ }} \times {\text{ }}a{\text{ }} \times {\text{ }}a\)
    Correct
  • B
    a
  • C
    \(a{\text{ }} \times {\text{ }}a{\text{ }} \times {\text{ }}a\)
  • D
    \(a{\text{ }} \times {\text{ }}a\)
4
In\({\left( { - {\text{9}}} \right)^{\text{4}}}\), the base is (-9) and the exponent is _______.
  • A
    -4
  • B
    9
  • C
    None of these
  • D
    4
    Correct
5
\({\left( { - {\text{1}}} \right)^{\text{5}}}\)is equal to ____.
  • A
    1
  • B
    -1
    Correct
  • C
    0
  • D
    2
6
\({\left( {{{\text{2}}^{\text{3}}}} \right)^{\text{2}}}\)= ______
  • A
    \({{\text{2}}^{\text{2}}}\)
  • B
    \({{\text{2}}^{\text{6}}}\)
    Correct
  • C
    \({{\text{2}}^{\text{3}}}\)
  • D
    \({{\text{2}}^{\text{5}}}\)
7
Simplify: \(\left( {{{\text{2}}^{\text{7}}} \times {\text{ }}{{\text{2}}^{\text{8}}}} \right){\text{ }} \div {\text{ }}{{\text{2}}^{{\text{12}}}}\).
  • A
    4
  • B
    8
    Correct
  • C
    2
  • D
    None of these
8
Find the number from each of the following expanded forms. \({\text{3 }} \times {\text{ 1}}{0^{\text{4}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{3}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{1}}} + {\text{ 2 }} \times {\text{ 1}}{0^0}\)
  • A
    35025
  • B
    35052
    Correct
  • C
    None of these
  • D
    35050
9
Find the number from each of the following expanded forms. \({\text{8 }} \times {\text{ 1}}{0^{\text{6}}} + {\text{ 6 }} \times {\text{ 1}}{0^{\text{4}}} + {\text{ 8 }} \times {\text{ 1}}{0^{\text{2}}} + {\text{ 3 }} \times {\text{ 1}}{0^{\text{1}}} + {\text{ 6 }} \times {\text{ 1}}{0^0}\)
  • A
    None of these
  • B
    8060860
  • C
    8060808
  • D
    8060806
    Correct
10
Simplify and write the answer in exponential form. \({{\text{7}}^{\text{8}}} \div {{\text{7}}^{\text{3}}}\)
  • A
    \({{\text{7}}^{\text{3}}}\)
  • B
    None of these
  • C
    \({{\text{7}}^{\text{4}}}\)
  • D
    \({{\text{7}}^{\text{5}}}\)
    Correct
11
Simplify and write the answer in exponential form. \({{\text{6}}^{\text{8}}} \div {\text{ }}{{\text{6}}^{\text{3}}}\)
  • A
    \({{\text{6}}^{\text{4}}}\)
  • B
    None of these
  • C
    \({{\text{6}}^{\text{5}}}\)
    Correct
  • D
    \({{\text{6}}^{\text{3}}}\)
12
Simplify and write the answer in exponential form. \({{\text{5}}^{\text{7}}} \div {\text{ }}{{\text{5}}^{\text{2}}}\)
  • A
    None of these
  • B
    \({{\text{7}}^{\text{5}}}\)
    Correct
  • C
    \({{\text{7}}^{\text{3}}}\)
  • D
    \({{\text{7}}^{\text{4}}}\)
13
Simplify and write the answer in exponential form. \({{\text{8}}^{\text{9}}} \div {\text{ }}{{\text{8}}^{\text{4}}}\)
  • A
    \({{\text{8}}^{\text{5}}}\)
    Correct
  • B
    \({{\text{8}}^{\text{3}}}\)
  • C
    \({{\text{8}}^{\text{4}}}\)
  • D
    None of these
14
Simplify and write the answer in exponential form. \({{\text{9}}^{\text{6}}} \div {\text{ }}{{\text{9}}^{\text{1}}}\)
  • A
    None of these
  • B
    \({{\text{9}}^{\text{5}}}\)
    Correct
  • C
    \({{\text{9}}^{\text{4}}}\)
  • D
    \({{\text{9}}^{\text{3}}}\)
15
Simplify and write the answer in exponential form. \({{\text{7}}^{\text{9}}} \div {\text{ }}{{\text{7}}^{\text{4}}}\)
  • A
    None of these
  • B
    \({{\text{7}}^{\text{4}}}\)
  • C
    \({{\text{7}}^{\text{5}}}\)
    Correct
  • D
    \({{\text{7}}^{\text{3}}}\)