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No, 6, 12, 18, 24...are even numbers that are multiples of 3.

Q: Is every multiple of 3 an odd number?

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15

Yes 3 is an odd number and 27 is a multiple of 3 because 3*9 = 27

15 and any odd multiple of 15.

Every prime number except 2 must be odd. This is because if it were even it would be divisible by 2 and so wouldn't be a prime number. The next point to note is that all odd numbers are one more or one less than a multiple of 4. Because 2 more than a multiple of 4 is even, and 3 more than a multiple of 4 is the same as 1 less than the multiple of 4 above. Thus every prime number except 2 must be 1 more or 1 less than a multiple of 4.

3 odd integers must total an odd number. 3 consecutive odd integers must total a multiple of 3. The lowest number greater than 162 which satisfies these requirements is 165, ie 53 + 55 + 57

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No, only every other multiple is odd. Example: 3,6,9,12,15,18

15

Every multiple of 3 which is not divisible by 2 is an odd number. Since every other multiple is divisible by 2, the remaining half of the multiples are odd numbers. These numbers are: 3, 9, 15, 21, 27, 33, 39, ... ad infinitum.

I think 6, 12 and 18 would disagree with that.

Yes 3 is an odd number and 27 is a multiple of 3 because 3*9 = 27

6.

Yes, after every even number, there is an odd. Odd number+ even number=odd number. For example: 1+2=3 , 2+3=5, 3+4=7

The answer is 9. It is a multiple of 3. 3+3+3=9. It is less than 20: 20-9=11.It is not a prime number. It is odd, and it is not a factor of 30. 30/9=3.3333333333

of course not. How about 5,7,11,13,17,.....?

Every multiple of 6 is.

15 and any odd multiple of 15.

All even numbers are, by definition, multiples of 2 and therefore are not prime. It follows that every prime number (other than 2) is odd as a prime number is defined as one which is not the multiple of any other integers. This is not to say that all odd numbers are prime. Odd and prime: 3, 5, 7, 11, 13, 17, 19 etc...