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The greatest one-digit number is 9. Adding 1 to the greatest one-digit number will result in 9+1 =10. That is, it results in the smallest two-digit number.
The greatest two-digit number is 99. Adding 1 to the greatest two-digit number will result in 99+1 =100. That is, it results in the smallest three-digit number.
Proceeding in this way, we can have the following table.
Greatest number | Adding 1 | Smallest number |
9 | +1 | =10 |
99 | +1 | =100 |
999 | +1 | =1000 |
9999 | +1 | =10000 |
99999 | +1 | =100000 |
9999999 | +1 | =1000000 |
9999999 | +1 | =10000000 |
Thus, the resultant pattern becomes,
Greatest single(1) digit number + 1 = smallest 2-digit number
Greatest 2-digit number + 1 = smallest 3-digit number
Greatest 3-digit number + 1 = smallest 4-digit number
Greatest 2-digit number + 1 = smallest 3-digit number
Greatest 3-digit number + 1 = smallest 4-digit number
and so on.
Important!
Recall the following:
1 tens = 10 ones
10 tens = 1 hundreds = 100 ones
1 thousand = 10 hundreds = 100 tens
1 lakh = 100 thousands = 1000 hundreds
1 crore = 100 lakhs = 10,000 thousands