Yes, it is by definition a 2 digit number. (At degree level anyway, however at secondary schools you may be taught differently. It depends on what definition your teacher uses).
However if you're referring to "significant digits", it has only one significant digit (the 1).
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10 is the lowest two digit number.
The smallest 2 digit whole number is 10 The smallest 2 digit odd whole number is 11
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Well, friend, when you add two two-digit numbers together, the sum will always be a two-digit number or a three-digit number, not a four-digit number. It's like mixing different colors on your palette - you'll get a beautiful new shade, but it won't be something completely different. Just keep adding those numbers together and creating something wonderful!
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