Which of the following best completes the sequence below?

5, 10, 15, 20...

21 - Just kidding! The correct answer is 25. Don't worry, sometimes numbers can be a little tricky.

To find the missing number in the sequence 5, 10, 15, 20..., we can observe that each number in the sequence is obtained by adding 5 to the previous number. Therefore, the missing number should be 25.

So, the sequence is: 5, 10, 15, 20, 25.

To determine which option best completes the sequence 5, 10, 15, 20, we need to look for a pattern in the sequence and apply it to the available options.

In this case, we can observe that each number in the sequence is increasing by 5. Therefore, the pattern is adding 5 to each previous number to get the next.

Applying this pattern to the given options:

A) 23 - Adding 5 to the previous number would give us 20 + 5 = 25, not 23.

B) 22 - Again, adding 5 to the previous number would give us 20 + 5 = 25, not 22.

C) 25 - Adding 5 to the previous number would give us 20 + 5 = 25. This option follows the pattern and completes the sequence correctly.

D) 30 - Adding 5 to the previous number would give us 20 + 5 = 25, not 30.

Therefore, the option C) 25 is the best choice to complete the sequence 5, 10, 15, 20.

what do you mean by "completes"? The sequence goes on forever, as indicated by the ellipsis.

And, you don't provide any choices anyway...