Question

Which one of the following numbers is an irrational number?

Answer 1

Answer:

B. 8.12131415

This is because irrational numbers are numbers that go on an infinite amount of times and cannot properly be turned into a fraction. A repeating number is a rational number because it can be expressed as a ratio.

Answer 2

Answer:

B. $8.12131415...$

Step-by-step explanation:

We are asked to find irrational number from our given choices.

We know that a number is irrational, when it can not be written as a fraction.

We also know that repeating decimals are also rational numbers.

Upon looking at our given choices, we can see that option A is a fraction, therefore, it is a rational number.

Options C and D has repeating decimals, therefore, they are rational as well.

Option B has non repeating and non-terminating decimal, therefore, $8.12131415...$ is an irrational number.