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When 10 is added to a number, the digit at its tens place increases by 1.
For example: Consider the number 123. It can be written in the place value table as:
| Hundreds | Tens | Ones |
| 1 | 2 | 3 |
There are 2 tens in the number 123.
When 10 is added to 123, the digit at its tens place increases by 1.
2 + 1 = 3
So, 123 + 10 = 133.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21,27,23
21 is the smallest number.
