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Subjects>Math>Algebra

Is 18 an irrational number

Anonymous

∙ 7y ago

Updated: 1/26/2025

NO!!

Irrational Numbers are those where the decimal digits go to infinity AND there is no regular order in the decimal digits.

pi = 3.141592.... is the most well known irrational number.

as are the 'Square roots' od prime numbers;-#

sqrt(2) = 1.414213....

sqrt(3) = 1.73205...

sqrt(5) = 2.23606...

However,

such as numbers as

3.3333..... is NOT irrational, because the decimals are in regular order.

Similarly

2.373737....

or

5 .678678678....

Are NOT irrational because the decimals are in a regular order.

NB '....''' at the end of a decimal is the mathematical indication of recurring to infinity.

lenpollock ∙

Lvl 16

∙ 3mo ago

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More answers

yes it is an irrational number
No because 18 is a rational number

Wiki User

∙ 7y ago

No. If you can write the number on paper, it's rational.

-18 is the ratio of -18 to 1, and also the ratio of 18 to -1.

Wiki User

∙ 14y ago

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