Final answer:
The question pertains to multiples of a number, particularly a multiple of 5. Options A) 15, B) 20, and C) 30 are all multiples of 5. However, D) 33 is not a multiple of 5 since there's no integer we can multiply by 5 to get 33.
Step-by-step explanation:
The student has asked a question related to multiple of a number, explicitly, a multiple of 5. In mathematics, a multiple of a number is the product of any quantity and that number. For example, multiples of 5 are build by multiplying 5 by any integer including 5 x 1 = 5, 5 x 2 = 10, 5 x 3 = 15, 5 x 4 = 20, 5 x 6 = 30, and so on.
Now, let's look at the options mentioned in the question:
15 is a multiple of 5 because 5 x 3 = 15
30 is a multiple of 5 because 5 x 6 = 30
33 is not a multiple of 5 because there is no integer you can multiply by 5 to get 33
So, the answer to the question 'Which of the following numbers is not a multiple of 5?' is option D) 33.
Learn more about Multiples of a Number