No it is rational because it doesn't go on forever.
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The square root of 20 is an irrational number
20 squared is 400 which is a rational number
No. An irrational number is one that cannot be written as a fraction. 20/2 is a fraction that equals 10, so 10 is rational. √10 would be irrational, though.■
An irrational fraction can be reduced. For example, sqrt(20)/6 = sqrt(5)/3
No, it is a rational number, because all natural numbers are rational.