Which of the following is an irrational number between 4 and 8?

1. 17
2. 5
3. 12
4. 8

To determine which of the given numbers is an irrational number between 4 and 8, we must first understand what an irrational number is.

An irrational number is a number that cannot be expressed as a fraction of two integers and has an infinite number of non-repeating decimal places.

Out of the given options, the only number that fits this criteria is 5. Therefore, the correct answer is option 2.

To determine which of the given numbers is an irrational number between 4 and 8, we need to understand what irrational numbers are.

An irrational number is a number that cannot be expressed as a fraction of two integers and has an infinite non-repeating decimal representation.

1. 17 is not an irrational number because it can be expressed as the fraction 17/1.
2. 5 is not an irrational number because it can be expressed as the fraction 5/1.
3. 12 is not an irrational number because it can be expressed as the fraction 12/1.
4. 8 is not an irrational number because it can be expressed as the fraction 8/1.

None of the given options are irrational numbers between 4 and 8.