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Adding 1 to the greatest single-digit number gives the smallest number with digits numbering:

AFive
BNine
CTwo
DFour
Answer & Solution
Correct answer: C. Two
1. Nine plus one is ten. 2. Ten is the first number past the single digits. 3. So it has two digits. _Source: syllabus Mathematics Class VI, Chapter 1, Knowing Our Numbers._
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