Class 8 Exponents And Powers CBSE Questions & Answers

Class 8 · Exponents And Powers

This is Mathematics Class 8 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 multiplicative inverse of\({{\text{3}}^{-{\text{ 4}}}}\).
  • A
    \({{\text{3}}^{\text{2}}}\)
  • B
    \({{\text{3}}^{\text{4}}}\)
    Correct
  • C
    \({{\text{3}}^{\text{3}}}\)
  • D
    \({{\text{3}}^{\text{5}}}\)
2
Find the multiplicative inverse of\({{\text{5}}^{-{\text{ 5}}}}\).
  • A
    \({{\text{5}}^{\text{2}}}\)
  • B
    \({{\text{5}}^{\text{4}}}\)
  • C
    \({{\text{5}}^{\text{3}}}\)
  • D
    \({{\text{5}}^{\text{5}}}\)
    Correct
3
Find the multiplicative inverse of\( - {{\text{6}}^{--{\text{ 2}}}}\).
  • A
    \( - {{\text{6}}^{\text{2}}}\)
    Correct
  • B
    \({{\text{6}}^{\text{5}}}\)
  • C
    \( - {{\text{6}}^{\text{4}}}\)
  • D
    \({{\text{6}}^{\text{2}}}\)
4
Find the multiplicative inverse of\({{\text{7}}^{--{\text{ 7}}}}\).
  • A
    \({{\text{7}}^{\text{7}}}\)
    Correct
  • B
    \({{\text{7}}^{\text{4}}}\)
  • C
    \({{\text{7}}^{\text{6}}}\)
  • D
    \({{\text{7}}^{\text{5}}}\)
5
Find the multiplicative inverse of\({\text{1}}{0^{--{\text{ 8}}}}\).
  • A
    \({\text{1}}{0^{\text{8}}}\)
    Correct
  • B
    \({\text{1}}{0^{\text{5}}}\)
  • C
    \({\text{1}}{0^{\text{7}}}\)
  • D
    \({\text{1}}{0^{\text{6}}}\)
6
Simplify and write in exponential form: \({\left( {--{\text{3}}} \right)^{--{\text{3}}}} \times {\text{ }}{\left( {--{\text{3}}} \right)^{--{\text{ 4}}}}\)
  • A
    \({\left( {\text{3}} \right)^{\text{7}}}\)
  • B
    \({\left( { - {\text{3}}} \right)^{ - {\text{7}}}}\)
    Correct
  • C
    \({\left( {\text{3}} \right)^{ - {\text{7}}}}\)
  • D
    \({\left( { - {\text{3}}} \right)^{\text{7}}}\)
7
Simplify and write in exponential form: \({\left( {--{\text{5}}} \right)^{--{\text{5}}}} \times {\text{ }}{\left( {--{\text{5}}} \right)^{--{\text{ 4}}}}\)
  • A
    \({\left( {\text{5}} \right)^{\text{9}}}\)
  • B
    \({\left( { - {\text{5}}} \right)^{\text{9}}}\)
  • C
    \({\left( { - {\text{5}}} \right)^{ - {\text{9}}}}\)
    Correct
  • D
    \({\left( {\text{5}} \right)^{ - {\text{9}}}}\)
8
Simplify and write in exponential form: \({\left( {--{\text{7}}} \right)^{--{\text{2}}}} \times {\text{ }}{\left( {--{\text{7}}} \right)^{--{\text{ 5}}}}\)
  • A
    \({\left( { - {\text{7}}} \right)^{ - {\text{7}}}}\)
    Correct
  • B
    \({\left( { - {\text{7}}} \right)^{\text{7}}}\)
  • C
    \({\left( {\text{7}} \right)^{ - {\text{7}}}}\)
  • D
    \({\left( {\text{7}} \right)^{\text{7}}}\)
9
Simplify and write in exponential form: \({\left( {--{\text{8}}} \right)^{--{\text{3}}}} \times {\text{ }}{\left( {--{\text{8}}} \right)^{--{\text{ 5}}}}\)
  • A
    \({\left( { - {\text{8}}} \right)^{\text{8}}}\)
  • B
    \({\left( {\text{8}} \right)^{ - {\text{8}}}}\)
  • C
    \({\left( {\text{8}} \right)^{\text{8}}}\)
  • D
    \({\left( { - {\text{8}}} \right)^{ - {\text{8}}}}\)
    Correct
10
Simplify and write in exponential form: \({\left( {\text{9}} \right)^{\text{3}}} \times {\text{ }}{\left( {\text{9}} \right)^{\text{7}}}\)
  • A
    \({\left( {\text{9}} \right)^{\text{9}}}\)
  • B
    \({\left( {\text{9}} \right)^{{\text{1}}0}}\)
    Correct
  • C
    \({\left( { - {\text{9}}} \right)^{{\text{1}}0}}\)
  • D
    \({\left( {\text{9}} \right)^{ - {\text{1}}0}}\)
11
A group of students were given an assignment to collect different types of leaves. The group collected 625 types of leaves. Represent the number of leaves collected in the form of exponential expression with its base being indivisible.
  • A
    \({{\text{5}}^{\text{3}}}\)
  • B
    None of these
  • C
    \({{\text{5}}^{\text{4}}}\)
    Correct
  • D
    \({{\text{5}}^{\text{2}}}\)
12
A group of students were given an assignment to collect different types of leaves. The group collected 343 types of leaves. Represent the number of leaves collected in the form of exponential expression with its base being indivisible.
  • A
    7
  • B
    None of these
  • C
    \({{\text{7}}^{\text{2}}}\)
  • D
    \({{\text{7}}^{\text{3}}}\)
    Correct
13
A group of students were given an assignment to collect different types of leaves. The group collected 81 types of leaves. Represent the number of leaves collected in the form of exponential expression with its base being indivisible.
  • A
    None of these
  • B
    \({{\text{3}}^{\text{3}}}\)
  • C
    \({{\text{3}}^{\text{4}}}\)
    Correct
  • D
    \({{\text{3}}^{\text{2}}}\)
14
A group of students were given an assignment to collect different types of leaves. The group collected 1331 types of leaves. Represent the number of leaves collected in the form of exponential expression with its base being indivisible.
  • A
    None of these
  • B
    \({\text{1}}{{\text{1}}^{\text{3}}}\)
    Correct
  • C
    \({\text{1}}{{\text{1}}^{\text{4}}}\)
  • D
    \({\text{1}}{{\text{1}}^{\text{2}}}\)
15
A group of students were given an assignment to collect different types of leaves. The group collected 2197 types of leaves. Represent the number of leaves collected in the form of exponential expression with its base being indivisible.
  • A
    133
    Correct
  • B
    134
  • C
    None of these
  • D
    132