Reply to "Numbers"

So, all the four examples include the first number, which, in this case, is 10.
Or is it possible any of them do not include the first number, 10?
And if I need more clarification on where the speaker draws a line, I should ask a further question, such as " You mean 20 included?" or "10 is included, right?".
Is this what you would normally do?

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