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Numbers
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Why?
1.
What is the ordinal form of the number one in a number of European languages?
First
Second
Third
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Why?
0.999...
What is the proof that 0.999... is equal to 1 based on?
Comparison and addition of decimal numbers
Series and limits
Formal construction of real numbers
Geometric series
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Why?
0.999...
What is the smallest number that is greater than all 0.9, 0.99, 0.999, etc.?
0.999...
0.9
0.99
1
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Why?
0.999...
What is the notation for the repeating decimal consisting of an unending sequence of 9s after the decimal point?
0.999...
0.9
0..9
0.(9)
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Why?
6
What is the smallest perfect number?
4
6
8
10
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