irrational
square root of 121 = 11
square root of 1.21 = 1.1
square root of 12.1 = 3.47...
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[ square root of (4.1) ] is irrational. But [ square root of (4) ] is rational.
The square root of 1.44 is 1.2 which is a rational number
It is rational. The root of a perfect square, such as 4, is rational; the root of any positive integer that is not a perfect square is an irrational number.
The square root of the prime number 19 is an irrational number
The square root of 25 is 5, which is a rational number.