For a fixed base, 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

Hundredth of the previous number

Hundred times of the previous number

answer is A.

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Detailed Solution

It is given for a fixed base, the exponent decreases by 1.
If the exponent fell by 1. The number will thereafter be reduced to one-tenth of the prior number for the fixed basis.
For example:

, exponent is decreased by 1

⇒ 109 = 10 9 − 1 ⇒ 109 = 108 ⇒ 1081090 = 110

Thus, the number will become one-tenth of the previous number.
Hence option (1) is correct.

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