Which of the following numbers is a factor of every number?
0
1
2
3
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1 is a factor of every number. 0 cannot be considered a factor because division by 0 is not defined.
Hence, option 2 is the correct option.
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Which of the following is the smallest whole number?
-1
None of these
Which of the following is a well-defined set?
The set of tall students in a class
The set of good books
The set of prime numbers less than 20
The set of beautiful flowers