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

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One-tenth of the previous number.

Ten times of the previous number

Hundred of the previous number

Hundred times of the previous number

answer is A.

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Detailed Solution

Given that the fixed base is 10 and the exponent decreases by

1

.
We have to find that if the exponent is decreased by

1

, then for the fixed base, what will the number be.
For example,
For

10^{5}

, exponent decreases by

1

\Rightarrow 10^{5 - 1} = 10^{4}

\Rightarrow \frac{10^{4}}{10^{5}} = \frac{1}{10}

Therefore, the number becomes one-tenth of the previous number.
Hence, option 1 is correct.

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