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
Find the value of\({\text{1}}{{\text{1}}^{\text{2}}}\).
  • A
    121
    Correct
  • B
    22
  • C
    11
  • D
    None of these
2
In simplified form \({\left( {{\text{ }}{{\text{3}}^0} + {\text{ }}{{\text{4}}^0} + {\text{ }}{{\text{5}}^0}} \right)^0}\) is equals to
  • A
    12
  • B
    None of these
  • C
    3
  • D
    1
    Correct
3
Find the value of\({\left( {\frac{2}{3}} \right)^2}\).
  • A
    \(\frac{4}{9}\)
    Correct
  • B
    9
  • C
    \(\frac{9}{4}\)
  • D
    4
4
Find the value of \({\left( {\frac{1}{6}} \right)^2}\).
  • A
    \(\frac{1}{6}\)
  • B
    6
  • C
    36
  • D
    \(\frac{1}{{36}}\)
    Correct
5
Find the value of\({\left( {\frac{3}{5}} \right)^2}\).
  • A
    9
  • B
    \(\frac{{25}}{9}\)
  • C
    25
  • D
    \(\frac{9}{{25}}\)
    Correct
6
Find the value of\({\left( {\frac{4}{7}} \right)^2}\).
  • A
    49
  • B
    \(\frac{{16}}{{49}}\)
    Correct
  • C
    \(\frac{{49}}{{16}}\)
  • D
    16
7
Find the value of\({\left( {\frac{5}{6}} \right)^2}\).
  • A
    \(\frac{{36}}{{25}}\)
  • B
    36
  • C
    25
  • D
    \(\frac{{25}}{{36}}\)
    Correct
8
Find the value of\({\left( {\frac{1}{4}} \right)^2}\).
  • A
    16
  • B
    4
  • C
    \(\frac{1}{4}\)
  • D
    \(\frac{1}{{16}}\)
    Correct
9
Find the value of\({\left( {\frac{1}{7}} \right)^2}\).
  • A
    \(\frac{1}{{49}}\)
    Correct
  • B
    \(\frac{1}{7}\)
  • C
    7
  • D
    49
10
Find the value of\({\left( {\frac{7}{9}} \right)^2}\).
  • A
    81
  • B
    \(\frac{{49}}{{81}}\)
    Correct
  • C
    \(\frac{{81}}{{49}}\)
  • D
    49
11
In standard form 52,00,00,000 is equal to ___________ .
  • A
    None of these
  • B
    \({\text{52}} \times {\text{1}}{0^{\text{7}}}\)
  • C
    \({\text{5}}.{\text{2}} \times {\text{1}}{0^{\text{8}}}\)
    Correct
  • D
    \({\text{5}}.{\text{2}} \times {\text{1}}{0^{\text{7}}}\)
12
Usual form of the expression \({\text{1}}{0^{\text{4}}}\) is given by _____________ .
  • A
    1000
  • B
    None of these
  • C
    10000
    Correct
  • D
    100
13
\({\text{7}} \times {\text{1}}{0^{ - {\text{5}}}}\)m is the standard form of which of the following ________ .
  • A
    0.0007
  • B
    0.00007
    Correct
  • C
    0.0000007
  • D
    0.000007
14
The standard form of 4050000 is given by ______________ .
  • A
    \({\text{4}}0.{\text{5}} \times {\text{1}}{0^{\text{8}}}\)
  • B
    \({\text{4}}0{\text{5}} \times {\text{1}}{0^{\text{6}}}\)
  • C
    \({\text{4}}.0{\text{5}} \times {\text{1}}{0^{\text{6}}}\)
    Correct
  • D
    None of these
15
Express\(\left( {{{\text{3}}^{\text{7}}}{\text{x}}{{\text{3}}^{\text{3}}}} \right){\text{x}}{{\text{3}}^{\text{3}}}\) as a rational number with negative exponent.
  • A
    \({\left( {\frac{1}{3}} \right)^{13}}\)
  • B
    \({\left( {\frac{1}{3}} \right)^{ - 13}}\)
    Correct
  • C
    1
  • D
    None of these