# Exponents and Power (Mathematics) Class 8 - NCERT Questions

Q 1.

Evaluate.

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Q 2.

Simplify and express the result in power notation with positive exponent.

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Q 3.

Find the value of

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Q 4.

Evaluate

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Q 5.

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Q 6.

Evaluate

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Q 7.

Simplify

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Q 8.

Express the following numbers in standard form.
(i) 0.0000000000085
(ii) 0.00000000000942
(iii) 6020000000000000
(iv) 0.00000000837
(v) 31860000000

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Q 9.

Express the following numbers in usual form.

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Q 10.

Express the number appearing in the following statements in standard form.
(i) 1 micron is equal to 1/1000000m
(ii) Charge of an electron is 0.000,000,000,000,000,000,16 coulomb.
(iii) Size of a bacteria is 0.0000005 m.
(iv) Size of a plant cell is 0.00001275 m.
(v) Thickness of a thick paper is 0.07 mm.

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Q 11.

In a stack, there are 5 books each of thickness 20 mm and 5 paper sheets each of thickness 0.016 mm. What is the total thickness of the stack.

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