It is an odd number.
They are all multiples of 3
9 is a number
When you see "9 times a number," it means you are multiplying that number by 9. For example, if the number is 5, then 9 times 5 would equal 45. In mathematical terms, you would write this as 9 * x, where x represents the unknown number.
Every number is divisible by 9 but the answer wont necessarily be a whole number.
It is an odd number.
An even number whose digits add up to 9 or a multiple of 9.
1
any multpile of 18
It is a negative mixed fraction or improper fraction, a rational number, a real number.
They are all multiples of 3
2
Every number except zero is a factor of every other number. Usually this kind of question is intended as a question about integral factors, those that can be paired with another integer to produce the number as a product. In that sense, 9 is not an integral factor of 11, because the paired number with 9 is 11/9, a number that is not an integer.
+9
9 is a number
It would depend on where you put the parentheses. 7/9 - 9 is a rational number 7/(9-9) is not even a number at all - surely not a rational number.
Actually, 9 is NOT a prime number.