Question

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

• A. One-tenth of the previous number
• B. Ten times of the previous number
• C. Hundredth of the previous number
• D. Hundred times of the previous number

Answer 1

The correct option is A

One-tenth of the previous number

Explanation for the correct option:

Let the number be ${10}^6$.

Given, the exponent decreases by $1$, implies that the number becomes ${10}^5$.

$\therefore \frac{{10}^5}{{10}^6}=\frac{1}{10}$

$\Rightarrow$The number becomes one-tenth of the previous number.

Hence, option A is correct.