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 \({\left( { - {\text{9}}} \right)^{\text{3}}} \times {\left( { - {\text{4}}} \right)^{\text{2}}}\).
- A-11664Correct
- BNone of these
- C25
- D36
2
Simplify: \({{\text{7}}^{\text{x}}} \times {{\text{7}}^{\text{2}}}\)
- ANone of these
- B\({{\text{7}}^{{\text{x}} - {\text{2}}}}\)
- C\({{\text{7}}^{{\text{x}} + {\text{2}}}}\)Correct
- D\({{\text{7}}^{{\text{x}} + {\text{3}}}}\)
3
Which is greater?
- A\({{\text{3}}^{\text{2}}}\)
- B\({{\text{8}}^{\text{2}}}\)
- C\({{\text{2}}^{\text{8}}}\)Correct
- D\({{\text{2}}^{\text{3}}}\)
4
Find the value of \(\left( {{{\text{6}}^0} - {\text{ }}{{\text{2}}^0}} \right){\text{ }} \times {\text{ }}\left( {{{\text{6}}^0} + {\text{ }}{{\text{2}}^0}} \right).\)
- A2
- B3
- C0Correct
- D1
5
In\({\left( { - {\text{9}}} \right)^{\text{4}}}\), the base is _______ and the exponent is 4.
- A4
- B-9Correct
- C-4
- D9
6
\({\left( { - {\text{1}}} \right)^{\text{4}}}\)is equal to ____.
- A-1
- B0
- C2
- D1Correct
7
\({\left( {{{\text{a}}^{\text{x}}}} \right)^{\text{y}}}\) = _____
- A\({{\text{a}}^{\text{x}}}\)
- B\({{\text{a}}^{\text{y}}}\)
- CNone of these
- D\({{\text{a}}^{{\text{xy}}}}\)Correct
8
Express 5,223,000,000 in the standard form.
- A\({\text{5 }} \times {\text{ 1}}{0^{\text{9}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 3 }} \times {\text{ 1}}{0^{\text{5}}}\)
- B\({\text{5 }} \times {\text{ 1}}{0^{\text{9}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 3 }} \times {\text{ 1}}{0^{\text{4}}}\)
- C\({\text{5 }} \times {\text{ 1}}{0^{\text{9}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 2 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 3 }} \times {\text{ 1}}{0^{\text{6}}}\)Correct
- DNone of these
9
Express 256,000,000 in the standard form.
- A\({\text{2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 6 }} \times {\text{ 1}}{0^{\text{4}}}\)
- B\({\text{2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 6 }} \times {\text{ 1}}{0^{\text{6}}}\)Correct
- C\({\text{2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 6 }} \times {\text{ 1}}{0^{\text{5}}}\)
- D\({\text{2 }} \times {\text{ 1}}{0^{\text{8}}} + {\text{ 5 }} \times {\text{ 1}}{0^{\text{7}}} + {\text{ 6 }} \times {\text{ 1}}{0^{\text{3}}}\)
10
Simplify and write the answer in exponential form. \({{\text{3}}^{{\text{7}}}} \div {{\text{3}}^{\text{4}}}\)
- A\({{\text{3}}^{\text{4}}}\)
- B\({{\text{3}}^{\text{7}}}\)
- C\({{\text{3}}^{\text{3}}}\)Correct
- D\({{\text{3}}^{\text{2}}}\)
11
Simplify and write the answer in exponential form. \({{\text{5}}^{\text{8}}} \div {\text{ }}{{\text{5}}^{{\text{4}}}}\)
- A\({{\text{5}}^{\text{2}}}\)
- B\({{\text{5}}^{\text{3}}}\)
- C\({{\text{5}}^{\text{4}}}\)Correct
- DNone of these
12
Find m so that\({\left( {\frac{2}{9}} \right)^3} \times {\left( {\frac{2}{9}} \right)^{ - 6}} = {\left( {\frac{2}{9}} \right)^{2m - 1}}\).
- A1
- B2
- C-1Correct
- D0
13
Fill in the Blank \({{\text{a}}^{\text{m}}} \div {\text{ }}{{\text{a}}^{\text{n}}}\) = a........ Where m and n are natural numbers:-
- A\({{\text{a}}^{{\text{mn}}}}\)
- B\({{\text{a}}^{{\text{m}} + {\text{n}}}}\)
- CNone of these
- D\({{\text{a}}^{{\text{m}} - {\text{n}}}}\)Correct
14
Express \({\left( {{\text{ 2a}}} \right)^{\text{4}}}\) in exponential form.
- A\({\text{2}}{{\text{a}}^{\text{4}}}\)
- B\({\text{4}}{{\text{a}}^{\text{3}}}\)
- C\({\text{8}}{{\text{a}}^{\text{4}}}\)
- D\({\text{16}}{{\text{a}}^{\text{4}}}\)Correct
15
The value of \(\frac{1}{{{3^2}}}\)is
- A3
- BNone of these
- C\(\frac{1}{9}\)Correct
- D\(\frac{1}{3}\)