What is the next number in the series: 5, 10, 15, 20?

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The series presented consists of numbers that are increasing in a consistent manner. Each number is separated by a difference of 5.

Starting with 5, when you add 5, you get 10. Adding 5 again gives you 15, and another addition of 5 results in 20.

To find the next number in the series, you continue this pattern by adding 5 to 20. Doing so leads you to 25.

This consistent increment of 5 establishes the pattern, confirming that 25 is indeed the next number in the sequence.