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
Express \({\left( { - 4} \right)^{ - 1}} \times {\left( {\frac{1}{3}} \right)^{ - 1}}\)as a rational number.
  • A
    \(\frac{{ - 3}}{4}\)
    Correct
  • B
    None of these
  • C
    \(\frac{4}{3}\)
  • D
    \(\frac{{ - 4}}{3}\)
2
Express 256 as a power 2.
  • A
    \({{\text{2}}^{\text{9}}}\)
  • B
    None of these
  • C
    \({{\text{2}}^{\text{7}}}\)
  • D
    \({{\text{2}}^{\text{8}}}\)
    Correct
3
\({{\text{2}}^{\text{3}}}\_\_\_\_\_{\text{ }}{{\text{3}}^{\text{2}}}\)
  • A
    None of these
  • B
    >
  • C
    =
  • D
    <
    Correct
4
Find the value of tex}{\text{1}}{{\text{1}}^{\text{2}}}{/tex}.
  • A
    121
    Correct
  • B
    11
  • C
    None of these
  • D
    22
5
678\(^\circ \) = ______
  • A
    0
  • B
    1
    Correct
  • C
    None of these
  • D
    678
6
Standard form of 70,040,000,000 is _______________.
  • A
    \({\text{7}}.00{\text{4 }} \times {\text{ 1}}{0^{{\text{1}}0}}\)
    Correct
  • B
    \({\text{7}}.00{\text{4 }} \times {\text{ 1}}{0^{\text{9}}}\)
  • C
    \({\text{7}}.00{\text{4 }} \times {\text{ 1}}{0^{\text{7}}}\)
  • D
    \({\text{7}}.00{\text{4 }} \times {\text{ 1}}{0^{{\text{12}}}}\)
7
Simplify \(\frac{{2 \times {3^4} \times {2^5}}}{{9 \times {4^2}}}\)
  • A
    None of these
  • B
    5
  • C
    36
    Correct
  • D
    30
8
Simplify and write the answer in exponential form. \({\left( {{{\text{6}}^{\text{5}}}} \right)^{{\text{3}}}} \div {\text{ }}{{\text{6}}^{\text{3}}}\)
  • A
    None of these
  • B
    \({{\text{6}}^{{\text{1}}0}}\)
  • C
    \({{\text{6}}^{{\text{11}}}}\)
  • D
    \({{\text{6}}^{{\text{12}}}}\)
    Correct
9
Simplify and write the answer in exponential form. \({\left( {{{\text{9}}^{{\text{5}}0}}} \right)^{\text{3}}}\)
  • A
    \({\left( {\text{9}} \right)^{{\text{5}}0}}\)
  • B
    None of these
  • C
    \({\left( {\text{9}} \right)^{\text{3}}}\)
  • D
    \({\left( {\text{9}} \right)^{{\text{15}}0}}\)
    Correct
10
By what number should \({\left( { - {\text{5}}} \right)^{\text{4}}}\) be divided so that the quotient may be equal to \({{\text{5}}^{ - {\text{2}}}}\)?
  • A
    \({{\text{5}}^{\text{4}}}\)
  • B
    \({{\text{5}}^{\text{6}}}\)
    Correct
  • C
    \({{\text{5}}^{\text{5}}}\)
  • D
    \({{\text{5}}^{\text{3}}}\)
11
Simplify: \(\frac{{{{14}^4}}}{{{7^4}}}\)
  • A
    4
  • B
    2
  • C
    16
    Correct
  • D
    8
12
Express 65,950 in the standard form.
  • A
    \({\text{6}}.{\text{595 }} \times {\text{ 1}}{0^{\text{4}}}\)
    Correct
  • B
    None of these
  • C
    \({\text{65}}.{\text{95 }} \times {\text{ 1}}{0^{\text{4}}}\)
  • D
    \({\text{6}}.{\text{595 }} \times {\text{ 1}}{0^{\text{5}}}\)
13
\({\text{1}}{00^{\text{2}}}\_\_\_\_\_{\text{ }}{{\text{2}}^{{\text{1}}00}}\)
  • A
    >
  • B
    <
    Correct
  • C
    None of these
  • D
    =
14
Express in exponential form: \(b \times b \times b \times b\)
  • A
    \({b^{\text{4}}}\)
    Correct
  • B
    \({b^{\text{3}}}\)
  • C
    None of these
  • D
    \({b^{\text{2}}}\)
15
3\(^\circ \) = _____
  • A
    9
  • B
    None of these
  • C
    3
  • D
    1
    Correct