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Question

# For a fixed base $10$, if the exponent decreases by $1$, the number becomes:

A

One-tenth of the previous number

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B

Ten times of the previous number

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C

Hundredth of the previous number

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D

Hundred times of the previous number

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Solution

## The correct option is A One-tenth of the previous numberExplanation for the correct option:Let the number be ${10}^{6}$.Given, the exponent decreases by $1$, implies that the number becomes ${10}^{5}$.$\therefore \frac{{10}^{5}}{{10}^{6}}=\frac{1}{10}$$⇒$The number becomes one-tenth of the previous number.Hence, option A is correct.

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