Question

I am a 3-digit number on adding 1 to me, you need to regroup ones, tens
and hundreds. I am
​

Answer 1

998 as on adding it gives 999 and you can regroup the numbers and there is no change in answer

Answer 2

The required number is 999.

• We are given a 3-digit number, which on adding 1 leads to the regrouping of ones, tens, and hundreds.
• In the numeral system, the ones, tens, and hundred's places are grouped together when a digit is present in the thousand's place of a place greater than it.
• So we need to find a 3-digit number which when added to 1 introduces a thousand's place in the number, i.e. becomes a four-digit number.
• We know that on adding 999 to 1, we get:

        999 + 1 = 1,000

        The ones, tens, and hundred's places are regrouped here.

Hence the required number is 999.

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