Final answer:
The least common number between 10,000,000 and 11,000,000 is 10,000,001, as it is the smallest number in the range that shares a common factor with others (the number 1).
Step-by-step explanation:
The student is asking for the least common number (LCN) between 10,000,000 and 11,000,000. To find the LCN within a range of numbers is to identify the smallest number within that range that has common factors with other numbers. In this case, considering the student's context and the numbers provided, every whole number has 1 as a common factor with any other whole number, thereby making 10,000,001 the least common number between 10,000,000 and 11,000,000 since we are asked for the smallest number that has a shared factor with others. If the intent was to find the least common multiple (LCM), which is the smallest number that is a multiple of two or more numbers in a set, that would be a different and more complex problem that would require specific numbers to find their LCM.