An irrational number is the square root of 5 since it cannot be written as a ratio of two integers.
What are irrational numbers?
Irrational numbers are number that cannot be written as a ratio of two integers.
Most irrational numbers are repeating decimals. From the given options, an irrational number is the square root of 5 since it cannot be written as a ratio of two integers.
Learn more on irrational number here; https://brainly.com/question/1300130
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